回彈法檢測(cè)混凝土抗壓強(qiáng)度技術(shù)規(guī)程（昆明地區(qū)分冊(cè)）

PAGE14PAGE1總則1.0.1為保證昆明地區(qū)使用回彈法檢測(cè)普通混凝土抗壓強(qiáng)度的檢測(cè)精度，制定本規(guī)程。1.0.2本規(guī)程適用于普通混凝土抗壓強(qiáng)度（以下簡(jiǎn)稱混凝土強(qiáng)度）的檢測(cè)，不適用于表層與內(nèi)部質(zhì)量有明顯差異或內(nèi)部存在缺陷的混凝土強(qiáng)度的檢測(cè)。1.0.3使用回彈法進(jìn)行檢測(cè)的人員，應(yīng)通過專門的技術(shù)培訓(xùn)。1.0.4回彈法檢測(cè)混凝土強(qiáng)度除應(yīng)符合本規(guī)程外，尚應(yīng)符合國(guó)家現(xiàn)行的有關(guān)標(biāo)準(zhǔn)的規(guī)定。

2術(shù)語(yǔ)、符號(hào)2.1術(shù)語(yǔ)2.1.1測(cè)區(qū)testarea檢測(cè)構(gòu)件混凝土強(qiáng)度時(shí)的一個(gè)檢測(cè)單元。2.1.2測(cè)點(diǎn)testpoint測(cè)區(qū)內(nèi)的一個(gè)回彈檢測(cè)點(diǎn)。2.1.3測(cè)區(qū)混凝土強(qiáng)度換算值conversionvalueofconcretecompressivestrengthoftestarea由測(cè)區(qū)的平均回彈值和碳化深度值通過測(cè)強(qiáng)曲線或測(cè)區(qū)強(qiáng)度換算表得到的測(cè)區(qū)現(xiàn)齡期混凝土強(qiáng)度值。2.1.4混凝土強(qiáng)度推定值estimationvalueofstrengthforconcrete相應(yīng)于強(qiáng)度換算值總體分布中保證率不低于95%的構(gòu)件中的混凝土強(qiáng)度值。2.2符號(hào)——測(cè)區(qū)的平均碳化深度值?！趥€(gè)測(cè)區(qū)碳化值的平均值；——測(cè)區(qū)混凝土強(qiáng)度換算值?！緲釉嚰炷翉?qiáng)度平均值?！瑮l件立方體試塊混凝土強(qiáng)度平均值?！獙?duì)應(yīng)于鉆芯部位或同條件試塊回彈測(cè)區(qū)混凝土強(qiáng)度換算值的平均值?！趇個(gè)混凝土芯樣試件的抗壓強(qiáng)度?！趇個(gè)混凝土立方體試件的抗壓強(qiáng)度?！拚暗趇個(gè)測(cè)區(qū)的混凝土強(qiáng)度換算值?！拚蟮趇個(gè)測(cè)區(qū)的混凝土強(qiáng)度換算值?！獦?gòu)件中測(cè)區(qū)混凝土強(qiáng)度換算值的最小值?！獦?gòu)件混凝土強(qiáng)度推定值?！獪y(cè)區(qū)混凝土強(qiáng)度換算值的平均值?！獦?gòu)件測(cè)區(qū)混凝土強(qiáng)度換算值的標(biāo)準(zhǔn)差?！獪y(cè)區(qū)第i個(gè)測(cè)點(diǎn)的回彈值?！獪y(cè)區(qū)或試塊的平均回彈值?！趥€(gè)測(cè)區(qū)回彈值的平均值；——回彈儀非水平狀態(tài)檢測(cè)時(shí)，測(cè)區(qū)的平均回彈值。——回彈儀在水平方向檢測(cè)混凝土澆筑表面時(shí)，測(cè)區(qū)的平均回彈值?！貜梼x在水平方向檢測(cè)混凝土澆筑底面時(shí)，測(cè)區(qū)的平均回彈值?！貜梼x檢測(cè)混凝土澆筑表面時(shí)，回彈值的修正值?！貜梼x檢測(cè)混凝土澆筑底面時(shí)，回彈值的修正值?！撬綘顟B(tài)檢測(cè)時(shí)，回彈值的修正值?！獪y(cè)區(qū)混凝土強(qiáng)度修正量。

3回彈儀3.1技術(shù)要求3.1.1回彈儀可為指針直讀式的，也可為數(shù)字式的。3.1.2回彈儀應(yīng)具有產(chǎn)品合格證及計(jì)量檢定證書，并應(yīng)在回彈儀的明顯位置上具有下列標(biāo)志：名稱、型號(hào)、制造廠名（或商標(biāo)）、出廠編號(hào)等。3.1.3回彈儀除應(yīng)符合現(xiàn)行國(guó)家標(biāo)準(zhǔn)《回彈儀》GB/T9138的標(biāo)準(zhǔn)外，尚應(yīng)符合下列規(guī)定：1水平彈擊時(shí)，在彈擊錘脫鉤瞬間，回彈儀的標(biāo)稱能量為2.207J；2在彈擊錘與彈擊桿碰撞的瞬間，彈擊拉簧應(yīng)處于自由狀態(tài)，且彈擊錘起跳點(diǎn)應(yīng)位于指針指示刻度尺上“0”處；3在洛氏硬度HRC為60±2的鋼砧上，回彈儀的率定值為80±2；4數(shù)字式回彈儀應(yīng)帶有指針直讀示值系統(tǒng)，數(shù)字顯示的回彈值與指針直讀示值相差不應(yīng)超過1。3.1.4回彈儀使用時(shí)的環(huán)境溫度應(yīng)為（0～35）℃。3.2檢定3.2.1回彈儀有下列情況之一時(shí)，應(yīng)由計(jì)量檢定機(jī)構(gòu)按現(xiàn)行行業(yè)標(biāo)準(zhǔn)《回彈儀》JJG817進(jìn)行檢定：1新回彈儀啟用前；2超過檢定有效期；3數(shù)字式回彈儀數(shù)字顯示的回彈值與指針直讀示值相差大于1；4經(jīng)常規(guī)保養(yǎng)后，鋼砧率定值不合格；5遭受嚴(yán)重撞擊或其他損害。3.2.2在下列情況之一時(shí)，回彈儀應(yīng)在鋼砧上進(jìn)行率定試驗(yàn)：1回彈儀當(dāng)天使用前后；2測(cè)試過程中對(duì)回彈儀性能有懷疑時(shí)。當(dāng)回彈儀率定值不在80±2范圍內(nèi)時(shí)，應(yīng)按本規(guī)程第3.3節(jié)的要求，對(duì)回彈儀進(jìn)行常規(guī)保養(yǎng)后再進(jìn)行率定。若再次率定仍達(dá)不到要求，則應(yīng)送檢定單位檢定。3.2.3回彈儀的率定試驗(yàn)應(yīng)符合下列規(guī)定：1率定試驗(yàn)應(yīng)在室溫為（0~35）℃的條件下進(jìn)行；2鋼砧表面干燥、清潔，并應(yīng)穩(wěn)固地平放在剛度大的物體上；3回彈值取連續(xù)向下彈擊三次的穩(wěn)定回彈結(jié)果的平均值；4率定試驗(yàn)應(yīng)分四個(gè)方向進(jìn)行，每個(gè)方向彈擊前，彈擊桿旋轉(zhuǎn)90度，每個(gè)方向的回彈平均值均應(yīng)為80±2。3.2.4回彈儀率定試驗(yàn)所用的鋼砧應(yīng)通過計(jì)量檢定機(jī)構(gòu)檢定或校準(zhǔn)。3.3保養(yǎng)3.3.1回彈儀具有下列情況之一時(shí)，應(yīng)進(jìn)行保養(yǎng)：1回彈儀彈擊超過2000次；2在鋼砧上的率定值不合格；3對(duì)檢測(cè)值有懷疑。3.3.2回彈儀的保養(yǎng)應(yīng)按下列步驟進(jìn)行：1先將彈擊錘脫鉤，取出機(jī)芯，然后卸下彈擊桿，取出里面的緩沖壓簧，并取出彈擊錘、彈擊拉簧和拉簧座。2清潔機(jī)芯各零部件，并應(yīng)重點(diǎn)清理中心導(dǎo)桿、彈擊錘和彈擊桿的內(nèi)孔及沖擊面。清理后，應(yīng)在中心導(dǎo)桿上薄薄涂抹鐘表油，其他零部件均不得抹油。3清理機(jī)殼內(nèi)壁，卸下刻度尺，檢查指針，其摩擦力為（0.5～0.8）N。4對(duì)于數(shù)字式回彈儀，還應(yīng)按產(chǎn)品要求的維護(hù)程序進(jìn)行維護(hù)。5保養(yǎng)時(shí)，不得旋轉(zhuǎn)尾蓋上已定位緊固的調(diào)零螺絲，不得自制或更換零部件。6保養(yǎng)后應(yīng)按本規(guī)程第3.2.3條的規(guī)定進(jìn)行率定。3.3.3回彈儀使用完畢，應(yīng)使彈擊桿伸出機(jī)殼，并應(yīng)清除彈擊桿、桿前端球面以及刻度尺表面和外殼上的污垢、塵土?；貜梼x不用時(shí)，應(yīng)將彈擊桿壓入儀器內(nèi)，彈擊后再按下按鈕，鎖住機(jī)芯，然后裝入儀器箱。儀器箱應(yīng)平放在干燥陰涼處。數(shù)字式回彈儀長(zhǎng)期不用時(shí)，應(yīng)取出電池。

4檢測(cè)技術(shù)4.1一般規(guī)定4.1.1采用回彈法檢測(cè)混凝土強(qiáng)度時(shí)，宜具有下列資料：1工程名稱、勘察、設(shè)計(jì)、施工、監(jiān)督、監(jiān)理單位名稱；2構(gòu)件名稱、數(shù)量及結(jié)構(gòu)類型、混凝土強(qiáng)度設(shè)計(jì)等級(jí)；3水泥品種規(guī)格、砂石品種規(guī)格、外加劑、摻合料品種；混凝土配合比等；4施工模板，混凝土澆筑、養(yǎng)護(hù)情況及澆筑日期等；5必要的設(shè)計(jì)圖紙和施工記錄；6檢測(cè)原因。4.1.2回彈儀在檢測(cè)前后，均應(yīng)在鋼砧上做率定試驗(yàn)，并應(yīng)符合本規(guī)程第3.1.3條的規(guī)定。4.1.3混凝土強(qiáng)度可按單個(gè)構(gòu)件或按批量進(jìn)行檢測(cè)，并應(yīng)符合下列規(guī)定：1單個(gè)構(gòu)件的檢測(cè)應(yīng)符合本規(guī)程第4.1.4條的規(guī)定。2對(duì)于混凝土生產(chǎn)工藝、強(qiáng)度等級(jí)相同，原材料、配合比、養(yǎng)護(hù)條件基本一致且齡期相近的一批構(gòu)件的檢測(cè)可采用批量檢測(cè)。按批量進(jìn)行檢測(cè)時(shí)，隨機(jī)抽取構(gòu)件，抽檢數(shù)量不宜少于同批構(gòu)件總數(shù)的30%且不宜少于10件。當(dāng)檢驗(yàn)批構(gòu)件數(shù)量大于30個(gè)時(shí)，抽樣構(gòu)件數(shù)量可按國(guó)家標(biāo)準(zhǔn)《建筑結(jié)構(gòu)檢測(cè)技術(shù)標(biāo)準(zhǔn)》GB/T50344的規(guī)定抽樣。4.1.4單一構(gòu)件的檢測(cè)應(yīng)符合下列規(guī)定：1對(duì)于一般構(gòu)件，測(cè)區(qū)數(shù)不宜少于10個(gè)。當(dāng)受檢構(gòu)件數(shù)量大于30個(gè)且不需提供單個(gè)構(gòu)件推定強(qiáng)度或受檢構(gòu)件某一方向尺寸不大于4.5m且另一方向尺寸不大于0.3m時(shí)，每個(gè)構(gòu)件的測(cè)區(qū)數(shù)量可適當(dāng)減少，但不應(yīng)少于5個(gè)。2相鄰兩測(cè)區(qū)的間距不應(yīng)大于2m，測(cè)區(qū)離構(gòu)件端部或施工縫邊緣的距離不宜大于0.5m，且不宜小于50mm。3測(cè)區(qū)宜選在使回彈儀處于水平方向的混凝土澆筑側(cè)面。當(dāng)不能滿足這一要求時(shí)，也可選在使回彈儀處于非水平方向的混凝土澆筑表面或底面。4測(cè)區(qū)宜布置在構(gòu)件的兩個(gè)對(duì)稱的可測(cè)面上，當(dāng)不能布置在對(duì)稱的可測(cè)面上時(shí)，也可布置在同一可測(cè)面上，且應(yīng)均勻分布。在構(gòu)件的重要部位及薄弱部位應(yīng)布置測(cè)區(qū)，并應(yīng)避開預(yù)埋件。5測(cè)區(qū)的面積不宜大于0.04m2；6測(cè)區(qū)表面清潔、平整，不應(yīng)有疏松層、浮漿、油垢、涂層以及蜂窩、麻面等不良狀況。7對(duì)彈擊時(shí)可能產(chǎn)生顫動(dòng)的薄壁、小型構(gòu)件，應(yīng)進(jìn)行固定。4.1.5測(cè)區(qū)應(yīng)標(biāo)有清晰的編號(hào)，在記錄紙上或采用電子媒體記錄方式，繪制測(cè)區(qū)布置示意圖和描述外觀質(zhì)量情況。4.1.6當(dāng)檢測(cè)條件與本規(guī)程第6.2.1條和第6.2.2條的使用條件有較大差異時(shí)，可采用在構(gòu)件上鉆取的混凝土芯樣或同條件試塊對(duì)測(cè)區(qū)混凝土強(qiáng)度換算值進(jìn)行修正。對(duì)同一強(qiáng)度等級(jí)混凝土修正時(shí)，芯樣數(shù)量不應(yīng)少于6個(gè)，芯樣應(yīng)在測(cè)區(qū)內(nèi)鉆取，芯樣高徑比應(yīng)為1。同條件試塊修正時(shí)，試塊數(shù)量不應(yīng)少于6個(gè)，試塊邊長(zhǎng)應(yīng)為150mm。計(jì)算時(shí)，測(cè)區(qū)混凝土強(qiáng)度修正量及測(cè)區(qū)混凝土強(qiáng)度換算值的修正應(yīng)符合下列規(guī)定：1修正量應(yīng)按下列公式計(jì)算：(4.1.6-1)(4.1.6-2)(4.1.6-3)(4.1.6-4)(4.1.6-5)式中：——測(cè)區(qū)混凝土強(qiáng)度修正值（MPa），精確到0.1MPa；——芯樣試件混凝土強(qiáng)度平均值（MPa），精確到0.1MPa；——150mm同條件立方體試塊混凝土強(qiáng)度平均值（MPa），精確到0.1MPa；——對(duì)應(yīng)于鉆芯部位或同條件立方體試塊回彈測(cè)區(qū)混凝土強(qiáng)度換算值的平均值（MPa），精確到0.1MPa；——第i個(gè)混凝土芯樣試件的抗壓強(qiáng)度；——第i個(gè)混凝土立方體試塊的抗壓強(qiáng)度；——對(duì)應(yīng)于第i個(gè)芯樣部位或同條件立方體試塊測(cè)區(qū)回彈值和碳化深度值的混凝土強(qiáng)度換算值，可按本規(guī)程附錄A或附錄B取值；——芯樣或試塊數(shù)量。2測(cè)區(qū)混凝土強(qiáng)度換算值的修正應(yīng)按下式計(jì)算：(4.1.6-6)式中：——第i個(gè)測(cè)區(qū)修正前的混凝土強(qiáng)度換算值（MPa），精確到0.1MPa；——第i個(gè)測(cè)區(qū)修正后的混凝土強(qiáng)度換算值（MPa），精確到0.1MPa。4.2回彈值測(cè)量4.2.1測(cè)量回彈值時(shí)，回彈儀的軸線應(yīng)始終垂直于混凝土檢測(cè)面，并應(yīng)緩慢施壓、準(zhǔn)確讀數(shù)、快速?gòu)?fù)位。4.2.2每一測(cè)區(qū)應(yīng)讀取16個(gè)回彈值，每一測(cè)點(diǎn)的回彈值讀數(shù)應(yīng)精確至1。測(cè)點(diǎn)宜在測(cè)區(qū)范圍內(nèi)均勻分布，相鄰兩測(cè)點(diǎn)的凈距離不宜小于20mm；測(cè)點(diǎn)距外露鋼筋、預(yù)埋件的距離不宜小于30mm；測(cè)點(diǎn)不應(yīng)在氣孔或外露石子上，同一測(cè)點(diǎn)應(yīng)只彈擊一次。4.3碳化深度值測(cè)量4.3.1回彈值測(cè)量完畢后，應(yīng)在有代表性的測(cè)區(qū)位置上測(cè)量碳化深度值，測(cè)點(diǎn)數(shù)不應(yīng)少于構(gòu)件測(cè)區(qū)數(shù)的30%，應(yīng)取其平均值作為該構(gòu)件每個(gè)測(cè)區(qū)的碳化深度值。當(dāng)碳化深度值極差大于2.0mm時(shí)，應(yīng)在每一測(cè)區(qū)分別測(cè)量碳化深度值。4.3.2碳化深度值的測(cè)量應(yīng)符合下列規(guī)定：1可采用適當(dāng)?shù)墓ぞ咴跍y(cè)區(qū)表面形成直徑約15mm的孔洞，其深度應(yīng)大于混凝土的碳化深度；2清除孔洞中的粉末和碎屑，且不得用水擦洗；3采用濃度為1%~2%的酚酞酒精溶液滴在孔洞內(nèi)壁的邊緣處，當(dāng)已碳化與未碳化界線清晰時(shí)，采用碳化深度測(cè)量?jī)x測(cè)量已碳化與未碳化混凝土交界面到混凝土表面的垂直距離，并應(yīng)測(cè)量3次，每次讀數(shù)精確至0.25mm。4應(yīng)取三次測(cè)量的平均值作為檢測(cè)結(jié)果，并應(yīng)精確至0.5mm。

5回彈值計(jì)算5.0.1計(jì)算測(cè)區(qū)平均回彈值時(shí)，應(yīng)從該測(cè)區(qū)的16個(gè)回彈值中剔除3個(gè)最大值和3個(gè)最小值，用余下的10個(gè)回彈值按下式計(jì)算：(5.0.1)式中：Rm——測(cè)區(qū)平均回彈值，精確至0.1；R——第i個(gè)測(cè)點(diǎn)的回彈值。5.0.2非水平方向檢測(cè)混凝土澆筑側(cè)面時(shí)，測(cè)區(qū)的平均回彈值應(yīng)按下式修正：(5.0.2)式中——非水平狀態(tài)檢測(cè)時(shí)測(cè)區(qū)的平均回彈值，精確至0.1；——非水平狀態(tài)檢測(cè)時(shí)回彈值修正值，應(yīng)按本規(guī)程附錄B選用。5.0.3水平方向檢測(cè)混凝土澆筑表面或澆筑底面時(shí)，測(cè)區(qū)的平均回彈值應(yīng)按下列公式修正：(5.0.3-1)(5.0.3-2)式中：、——水平方向檢測(cè)混凝土澆筑表面、底面時(shí)，測(cè)區(qū)的平均回彈值，精確至0.1；.、——混凝土澆筑表面、底面回彈值的修正值，應(yīng)按本規(guī)程附錄C采用。5.0.4當(dāng)回彈儀為非水平方向且測(cè)試面為混凝土的非澆筑側(cè)面時(shí)，應(yīng)先對(duì)回彈值進(jìn)行角度修正，并應(yīng)對(duì)修正后的回彈值再進(jìn)行澆筑面修正。

6測(cè)強(qiáng)曲線6.1一般規(guī)定6.1.1混凝土強(qiáng)度換算值可采用下列測(cè)強(qiáng)曲線計(jì)算：1統(tǒng)一測(cè)強(qiáng)曲線：由全國(guó)有代表性的材料、成型工藝制作的混凝土試塊，通過試驗(yàn)所建立的測(cè)強(qiáng)曲線。2地區(qū)測(cè)強(qiáng)曲線：由本地區(qū)常用的材料、成型工藝制作的混凝土試件，通過試驗(yàn)所建立的測(cè)強(qiáng)曲線。3專用測(cè)強(qiáng)曲線：由與構(gòu)件混凝土相同的材料、成型養(yǎng)護(hù)工藝制作的混凝土試件，通過試驗(yàn)所建立的測(cè)強(qiáng)曲線。6.1.2檢測(cè)單位宜按專用測(cè)強(qiáng)曲線、地區(qū)測(cè)強(qiáng)曲線、統(tǒng)一測(cè)強(qiáng)曲線的順序選用測(cè)強(qiáng)曲線。6.2昆明地區(qū)測(cè)強(qiáng)曲線6.2.1符合下列條件的混凝土，測(cè)區(qū)強(qiáng)度應(yīng)按本規(guī)程附錄A進(jìn)行強(qiáng)度換算：1混凝土采用的水泥、砂石、外加劑、摻合料、拌和用水符合國(guó)家現(xiàn)行有關(guān)標(biāo)準(zhǔn)；2采用普通成型工藝；3采用符合國(guó)家標(biāo)準(zhǔn)規(guī)定的模板；4蒸汽養(yǎng)護(hù)出池經(jīng)自然養(yǎng)護(hù)7d以上，且混凝土表層為干燥狀態(tài)；5自然養(yǎng)護(hù)且齡期為：（14～1000）d；6抗壓強(qiáng)度為：（15.0～60.0）MPa。6.2.2當(dāng)有下列情況之一時(shí)，測(cè)區(qū)混凝土強(qiáng)度不得按本規(guī)程附錄A進(jìn)行強(qiáng)度換算。1混凝土粗骨料最大公稱粒徑大于60mm；2粗骨料為河卵石；2特種成型工藝制作的混凝土；3檢測(cè)部位曲率半徑小于250mm；4潮濕或浸水混凝土。6.2.4使用本規(guī)程測(cè)強(qiáng)曲線時(shí)，被檢測(cè)的混凝土應(yīng)與制定該類測(cè)強(qiáng)曲線混凝土的適應(yīng)條件相同，不得超出該類測(cè)強(qiáng)曲線的適應(yīng)范圍。每半年抽取一定數(shù)量的同條件試件進(jìn)行校核，當(dāng)存在顯著差異時(shí)，應(yīng)查找原因，不得繼續(xù)使用。

7混凝土強(qiáng)度的計(jì)算7.0.1構(gòu)件第i個(gè)測(cè)區(qū)混凝土強(qiáng)度換算值，可按本規(guī)程第5章所求得的平均回彈值（Rm）及本規(guī)程第4.3條所求得的平均碳化深度值（dm）由本規(guī)程附錄A查表或根據(jù)下列公式計(jì)算確定：(7.0.1)式中：——第個(gè)測(cè)區(qū)的混凝土強(qiáng)度換算值(MPa)，精確至0.1MPa；.——第個(gè)測(cè)區(qū)回彈值的平均值，精確至0.1；——第個(gè)測(cè)區(qū)碳化值的平均值，精確至0.5mm。7.0.2構(gòu)件的測(cè)區(qū)混凝土強(qiáng)度平均值應(yīng)根據(jù)各測(cè)區(qū)的混凝土強(qiáng)度換算值計(jì)算。當(dāng)測(cè)區(qū)數(shù)為10個(gè)及以上時(shí)，還應(yīng)計(jì)算強(qiáng)度標(biāo)準(zhǔn)差。平均值及標(biāo)準(zhǔn)差應(yīng)按下列公式計(jì)算：(7.0.2-1)(7.0.2-2)式中：——同批構(gòu)件測(cè)區(qū)混凝土強(qiáng)度換算值的平均值（MPa）,精確至0.1MPa；——對(duì)于單個(gè)檢測(cè)的構(gòu)件，取該構(gòu)件的測(cè)區(qū)數(shù)；對(duì)批量檢測(cè)的構(gòu)件，取所有被抽檢構(gòu)件測(cè)區(qū)數(shù)之和；——結(jié)構(gòu)或構(gòu)件測(cè)區(qū)混凝土強(qiáng)度換算值的標(biāo)準(zhǔn)差（MPa），精確至0.01MPa。7.0.3構(gòu)件的現(xiàn)齡期強(qiáng)度推定值（）應(yīng)符合下列規(guī)定：1當(dāng)構(gòu)件測(cè)區(qū)數(shù)少于10個(gè)時(shí)，應(yīng)按下式計(jì)算：(7.0.3-1)式中：——構(gòu)件中最小的測(cè)區(qū)混凝土強(qiáng)度換算值。2當(dāng)構(gòu)件的測(cè)區(qū)強(qiáng)度值中出現(xiàn)小于15.0MPa時(shí)，應(yīng)按下式確定：(7.0.3-2)3當(dāng)構(gòu)件測(cè)區(qū)數(shù)不少于10個(gè)時(shí)，應(yīng)按下式計(jì)算：(7.0.3-3)4當(dāng)按批檢測(cè)時(shí)，應(yīng)按下式計(jì)算：(7.0.3-4)式中：k——推定系數(shù)，宜取1.645。當(dāng)需要進(jìn)行推定強(qiáng)度區(qū)間時(shí)，可按國(guó)家現(xiàn)行有關(guān)標(biāo)準(zhǔn)的規(guī)定取值。7.0.4對(duì)按批量檢測(cè)的構(gòu)件，當(dāng)該批構(gòu)件混凝土強(qiáng)度標(biāo)準(zhǔn)差出現(xiàn)下列情況之一時(shí)，該批構(gòu)件應(yīng)全部按單個(gè)構(gòu)件檢測(cè)：1當(dāng)該批構(gòu)件混凝土強(qiáng)度平均值小于25MPa時(shí)、大于4.5MPa時(shí)；2當(dāng)該批構(gòu)件混凝土強(qiáng)度平均值不小于25MPa且不大于60MPa、大于5.5MPa時(shí)。7.0.5回彈法檢測(cè)混凝土抗壓強(qiáng)度報(bào)告可按本規(guī)程附錄D的格式編寫。

附錄A測(cè)區(qū)混凝土強(qiáng)度換算表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.019.515.1－－－－－－－－－－－－19.615.3－－－－－－－－－－－－19.715.415.1－－－－－－－－－－－19.815.615.3－－－－－－－－－－－19.915.815.515.2－－－－－－－－－－20.015.915.615.3－－－－－－－－－－20.116.115.815.515.2－－－－－－－－－20.216.316.015.615.3－－－－－－－－－20.316.416.115.815.515.2－－－－－－－－20.416.616.316.015.715.3－－－－－－－－20.516.816.516.115.815.515.2－－－－－－－20.617.016.616.316.015.715.3－－－－－－－20.717.116.816.516.115.815.515.2－－－－－－20.817.316.916.616.316.015.615.3－－－－－－20.917.517.116.816.416.115.815.515.2－－－－－21.017.617.316.916.616.316.015.615.3－－－－－21.117.817.417.116.816.416.115.815.515.2－－－－21.218.017.617.316.916.616.315.915.615.3－－－－21.318.117.817.417.116.716.416.115.815.515.2－－－21.418.317.917.617.216.916.616.215.915.615.3－－－21.518.518.117.717.417.016.716.416.115.715.415.1－－21.618.618.317.917.617.216.916.516.215.915.615.3－－21.718.818.418.117.717.417.016.716.416.015.715.4－－21.819.018.618.217.917.517.216.816.516.215.915.515.2－21.919.118.818.418.017.717.317.016.616.316.015.715.4－22.019.318.918.518.217.817.517.116.816.516.115.815.515.222.119.519.118.718.318.017.617.316.916.616.316.015.615.322.219.619.318.918.518.117.817.417.116.716.416.115.815.522.319.819.419.018.718.317.917.617.216.916.616.215.915.622.420.019.619.218.818.418.117.717.417.016.716.416.015.722.520.119.719.419.018.618.217.917.517.216.816.516.215.922.620.319.919.519.118.818.418.017.717.317.016.616.316.022.720.520.119.719.318.918.518.217.817.517.116.816.416.122.820.620.219.819.419.118.718.318.017.617.316.916.616.322.920.820.420.019.619.218.818.518.117.717.417.116.716.423.021.020.620.219.819.419.018.618.217.917.517.216.916.523.121.120.720.319.919.519.118.818.418.017.717.317.016.7續(xù)表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.023.221.320.920.520.119.719.318.918.518.217.817.517.116.823.321.521.120.620.219.819.419.118.718.318.017.617.316.923.421.721.220.820.420.019.619.218.818.518.117.717.417.023.521.821.421.020.620.119.819.419.018.618.217.917.517.223.622.021.621.120.720.319.919.519.118.718.418.017.717.323.722.221.721.320.920.520.119.719.318.918.518.217.817.423.822.321.921.421.020.620.219.819.419.018.718.317.917.623.922.522.021.621.220.820.420.019.619.218.818.418.117.724.022.722.221.821.320.920.520.119.719.318.918.618.217.824.122.822.421.921.521.120.720.319.919.519.118.718.318.024.223.022.522.121.721.220.820.420.019.619.218.818.518.124.323.222.722.321.821.421.020.620.119.719.419.018.618.224.423.322.922.422.021.521.120.720.319.919.519.118.718.424.523.523.022.622.121.721.320.820.420.019.619.318.918.524.623.723.222.722.321.821.421.020.620.219.819.419.018.624.723.823.422.922.422.021.621.120.720.319.919.519.118.824.824.023.523.122.622.221.721.320.920.520.119.719.318.924.924.223.723.222.822.321.921.421.020.620.219.819.419.025.024.323.923.422.922.522.021.621.220.720.319.919.519.225.124.524.023.523.122.622.221.721.320.920.520.119.719.325.224.724.223.723.222.822.321.921.521.020.620.219.819.425.324.824.323.923.422.922.522.021.621.220.820.319.919.625.425.024.524.023.623.122.622.221.721.320.920.520.119.725.525.224.724.223.723.222.822.321.921.521.020.620.219.825.625.324.824.323.923.422.922.522.021.621.220.820.419.925.725.525.024.524.023.623.122.622.221.721.320.920.520.125.825.725.224.724.223.723.222.822.321.921.521.020.620.225.925.825.324.824.323.923.422.922.522.021.621.220.820.326.026.025.525.024.524.023.523.122.622.221.721.320.920.526.126.225.725.224.724.223.723.222.822.321.921.421.020.626.226.325.825.324.824.323.823.422.922.522.021.621.220.726.326.526.025.525.024.524.023.523.122.622.221.721.320.926.426.726.125.625.124.624.123.723.222.722.321.921.421.026.526.826.325.825.324.824.323.823.322.922.422.021.621.126.627.026.526.025.424.924.424.023.523.022.622.121.721.326.727.226.626.125.625.124.624.123.623.222.722.321.821.426.827.326.826.325.825.224.824.323.823.322.922.422.021.526.927.527.026.425.925.424.924.423.923.523.022.522.121.7續(xù)表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.027.027.727.126.626.125.625.124.624.123.623.122.722.221.827.127.827.326.826.225.725.224.724.223.723.322.822.421.927.228.027.526.926.425.925.424.924.423.923.423.022.522.127.328.227.627.126.526.025.525.024.524.023.623.122.622.227.428.327.827.226.726.225.725.224.724.223.723.222.822.327.528.528.027.426.926.325.825.324.824.323.823.422.922.527.628.728.127.627.026.526.025.524.924.524.023.523.022.627.728.828.327.727.226.626.125.625.124.624.123.623.222.727.829.028.427.927.326.826.325.725.224.724.323.823.322.827.929.228.628.027.526.926.425.925.424.924.423.923.423.028.029.328.828.227.627.126.626.025.525.024.524.023.623.128.129.528.928.427.827.326.726.225.725.224.724.223.723.228.229.729.128.528.027.426.926.325.825.324.824.323.823.428.329.929.328.728.127.627.026.526.025.525.024.524.023.528.430.029.428.828.327.727.226.626.125.625.124.624.123.628.530.229.629.028.427.927.326.826.325.725.224.724.223.828.630.429.829.228.628.027.526.926.425.925.424.924.423.928.730.529.929.328.728.227.627.126.526.025.525.024.524.028.830.730.129.528.928.327.827.226.726.225.725.124.624.228.930.930.229.629.128.527.927.426.826.325.825.324.824.329.031.030.429.829.228.628.127.527.026.525.925.424.924.429.131.230.630.029.428.828.227.727.126.626.125.625.124.629.231.430.730.129.529.028.427.827.326.726.225.725.224.729.331.530.930.329.729.128.528.027.426.926.325.825.324.829.431.731.130.529.829.328.728.127.627.026.526.025.525.029.531.931.230.630.029.428.828.327.727.226.626.125.625.129.632.031.430.830.229.629.028.427.927.326.826.225.725.229.732.231.630.930.329.729.128.628.027.426.926.425.925.329.832.431.731.130.529.929.328.728.127.627.026.526.025.529.932.531.931.330.630.029.428.928.327.727.226.626.125.630.032.732.031.430.830.229.629.028.427.927.326.826.325.730.132.932.231.631.030.329.729.228.628.027.526.926.425.930.233.032.431.731.130.529.929.328.728.227.627.126.526.030.333.232.531.931.330.630.029.528.928.327.727.226.726.130.433.432.732.131.430.830.229.629.028.427.927.326.826.330.533.532.932.231.631.030.329.729.228.628.027.526.926.430.633.733.032.431.731.130.529.929.328.728.227.627.126.530.733.933.232.531.931.330.630.029.528.928.327.727.226.7續(xù)表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.030.834.033.432.732.131.430.830.229.629.028.427.927.326.830.934.233.532.932.231.630.930.329.729.228.628.027.526.931.034.433.733.032.431.731.130.529.929.328.728.227.627.131.134.533.833.232.531.931.330.630.029.428.928.327.727.231.234.734.033.332.732.031.430.830.229.629.028.427.927.331.334.934.233.532.832.231.630.930.329.729.128.628.027.431.435.034.333.733.032.331.731.130.529.929.328.728.127.631.535.234.533.833.132.531.931.230.630.029.428.828.327.731.635.434.734.033.332.632.031.430.830.129.629.028.427.831.735.534.834.133.532.832.231.530.930.329.729.128.528.031.835.735.034.333.633.032.331.731.030.429.829.228.728.131.935.935.234.533.833.132.531.831.230.630.029.428.828.232.036.035.334.633.933.332.632.031.330.730.129.528.928.432.136.235.534.834.133.432.832.131.530.930.329.729.128.532.236.435.634.934.233.632.932.331.631.030.429.829.228.632.336.535.835.134.433.733.132.431.831.130.529.929.328.832.436.736.035.334.633.933.232.631.931.330.730.129.528.932.536.936.135.434.734.033.432.732.131.430.830.229.629.032.637.036.335.634.934.233.532.932.231.630.930.329.729.232.737.236.535.735.034.333.733.032.431.731.130.529.929.332.837.436.635.935.234.533.833.132.531.931.230.630.029.432.937.536.836.135.334.634.033.332.632.031.430.730.129.533.037.736.936.235.534.834.133.432.832.131.530.930.329.733.137.937.136.435.735.034.333.632.932.331.631.030.429.833.238.037.336.535.835.134.433.733.132.431.831.230.529.933.338.237.436.736.035.334.633.933.232.631.931.330.730.133.438.437.636.936.135.434.734.033.432.732.131.430.830.233.538.537.837.036.335.634.934.233.532.832.231.630.930.333.638.737.937.236.435.735.034.333.733.032.331.731.130.533.738.938.137.336.635.935.234.533.833.132.531.831.230.633.839.038.337.536.836.035.334.633.933.332.632.031.330.733.939.238.437.736.936.235.534.834.133.432.832.131.530.934.039.438.637.837.136.335.634.934.233.632.932.231.631.034.139.538.738.037.236.535.835.134.433.733.032.431.731.134.239.738.938.137.436.635.935.234.533.833.232.531.931.234.339.939.138.337.536.836.135.434.734.033.332.732.031.434.440.039.238.537.737.036.235.534.834.133.532.832.131.534.540.239.438.637.937.136.435.735.034.333.632.932.331.6續(xù)表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.034.640.439.638.838.037.336.535.835.134.433.733.132.431.834.740.539.738.938.237.436.736.035.234.633.933.232.531.934.840.739.939.138.337.636.836.135.434.734.033.332.732.034.940.940.039.338.537.737.036.235.534.834.133.532.832.235.041.040.239.438.637.937.136.435.735.034.333.632.932.335.141.240.439.638.838.037.336.535.835.134.433.733.132.435.241.340.539.739.038.237.436.736.035.334.633.933.232.635.341.540.739.939.138.337.636.836.135.434.734.033.332.735.441.740.940.139.338.537.737.036.335.534.834.233.532.835.541.841.040.239.438.637.937.136.435.735.034.333.633.035.642.041.240.439.638.838.037.336.535.835.134.433.733.135.742.241.340.539.739.038.237.436.736.035.334.633.933.235.842.341.540.739.939.138.337.636.836.135.434.734.033.335.942.541.740.940.039.338.537.737.036.335.534.834.133.536.042.741.841.040.239.438.637.937.136.435.735.034.333.636.142.842.041.240.439.638.838.037.336.535.835.134.433.736.243.042.241.340.539.738.938.237.436.736.035.234.533.936.343.242.341.540.739.939.138.337.636.836.135.434.734.036.443.342.541.740.840.039.238.537.737.036.235.534.834.136.543.542.741.841.040.239.438.637.837.136.435.734.934.336.643.742.842.041.140.339.538.838.037.236.535.835.134.436.743.843.042.141.340.539.738.938.137.436.635.935.234.536.844.043.142.341.540.639.839.138.337.536.836.135.334.736.944.243.342.441.640.840.039.238.437.736.936.235.534.837.044.343.542.641.840.940.139.338.637.837.136.335.634.937.144.543.642.841.941.140.339.538.738.037.236.535.735.037.244.743.842.942.141.340.439.638.938.137.336.635.935.237.344.844.043.142.241.440.639.839.038.237.536.736.035.337.445.044.143.242.441.640.739.939.138.437.636.936.135.437.545.244.343.442.641.740.940.139.338.537.837.036.335.637.645.344.443.642.741.941.040.239.438.737.937.136.435.737.745.544.643.742.942.041.240.439.638.838.037.336.535.837.845.744.843.943.042.241.340.539.738.938.237.436.736.037.945.844.944.043.242.341.540.739.939.138.337.636.836.138.046.045.144.243.342.541.640.840.039.238.537.736.936.238.146.245.344.443.542.641.841.040.239.438.637.837.136.438.246.345.444.543.642.841.941.140.339.538.738.037.236.538.346.545.644.743.842.942.141.340.439.638.938.137.336.6續(xù)表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.038.446.745.744.844.043.142.241.440.639.839.038.237.536.738.546.845.945.044.143.242.441.640.739.939.138.437.636.938.647.046.145.244.343.442.541.740.940.139.338.537.737.038.747.246.245.344.443.542.741.841.040.239.438.637.937.138.847.346.445.544.643.742.842.041.240.439.638.838.037.338.947.546.645.644.743.943.042.141.340.539.738.938.137.439.047.746.745.844.944.043.142.341.540.639.839.138.337.539.147.846.946.045.144.243.342.441.640.840.039.238.437.739.248.047.046.145.244.343.442.641.740.940.139.338.537.839.348.247.246.345.444.543.642.741.941.140.339.538.737.939.448.347.446.445.544.643.742.942.041.240.439.638.838.039.548.547.546.645.744.843.943.042.241.340.539.738.938.239.648.747.746.845.844.944.043.242.341.540.739.939.138.339.748.847.946.946.045.144.243.342.541.640.840.039.238.439.849.048.047.146.145.244.343.542.641.840.940.139.338.639.949.248.247.246.345.444.543.642.841.941.140.339.538.740.049.348.347.446.545.544.643.842.942.141.240.439.638.840.149.548.547.546.645.744.843.943.042.241.440.539.739.040.249.648.747.746.845.844.944.143.242.341.540.739.939.140.349.848.847.946.946.045.144.243.342.541.640.840.039.240.450.049.048.047.146.245.244.343.542.641.841.040.139.440.550.149.248.247.246.345.444.543.642.841.941.140.339.540.650.349.348.347.446.545.544.643.842.942.141.240.439.640.750.549.548.547.546.645.744.843.943.042.241.440.539.740.850.649.648.747.746.845.844.944.143.242.341.540.739.940.950.849.848.847.946.946.045.144.243.342.541.640.840.041.051.050.049.048.047.146.145.244.343.542.641.840.940.141.151.150.149.148.247.246.345.444.543.642.741.941.140.341.251.350.349.348.347.446.445.544.643.742.942.041.240.441.351.550.549.548.547.546.645.744.843.943.042.241.340.541.451.650.649.648.647.746.745.844.944.043.242.341.540.741.551.850.849.848.847.846.946.045.144.243.342.441.640.841.652.050.949.949.048.047.046.145.244.343.442.641.740.941.752.151.150.149.148.147.246.345.344.543.642.741.941.041.852.351.350.349.348.347.346.445.544.643.742.942.041.241.952.551.450.449.448.447.546.645.644.743.943.042.141.342.052.651.650.649.648.647.646.745.844.944.043.142.341.442.152.851.850.749.748.747.846.845.945.044.143.342.441.6續(xù)表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.042.253.051.950.949.948.947.947.046.145.244.343.442.541.742.353.152.151.050.049.148.147.146.245.344.443.542.741.842.453.352.251.250.249.248.247.346.445.444.543.742.842.042.553.552.451.450.449.448.447.446.545.644.743.842.942.142.653.652.651.550.549.548.547.646.645.744.843.943.142.242.753.852.751.750.749.748.747.746.845.945.044.143.242.442.854.052.951.850.849.848.847.946.946.045.144.243.342.542.954.153.052.051.050.049.048.047.146.145.244.343.542.643.054.353.252.251.150.149.148.247.246.345.444.543.642.743.154.453.452.351.350.349.348.347.446.445.544.643.742.943.254.653.552.551.450.449.448.547.546.645.644.743.943.043.354.853.752.651.650.649.648.647.646.745.844.944.043.143.454.953.952.851.850.749.748.847.846.845.945.044.143.343.555.154.053.051.950.949.948.947.947.046.145.244.343.443.655.354.253.152.151.050.049.048.147.146.245.344.443.543.755.454.353.352.251.250.249.248.247.346.345.444.543.743.855.654.553.452.451.350.349.348.447.446.545.644.743.843.955.854.753.652.551.550.549.548.547.646.645.744.843.944.055.954.853.752.751.750.649.648.747.746.845.844.944.044.156.155.053.952.851.850.849.848.847.846.946.045.144.244.256.355.254.153.052.050.949.948.948.047.046.145.244.344.356.455.354.253.252.151.150.149.148.147.246.245.344.444.456.655.554.453.352.351.250.249.248.347.346.445.544.644.556.855.654.553.552.451.450.449.448.447.446.545.644.744.656.955.854.753.652.651.550.549.548.547.646.645.744.844.757.156.054.953.852.751.750.749.748.747.746.845.945.044.857.356.155.053.952.951.850.849.848.847.946.946.045.144.957.456.355.254.153.052.051.049.949.048.047.146.145.245.057.656.455.354.253.252.151.150.149.148.147.246.345.345.157.856.655.554.453.352.351.250.249.248.347.346.445.545.257.956.855.754.653.552.451.450.449.448.447.546.545.645.358.156.955.854.753.652.651.550.549.548.547.646.745.745.458.257.156.054.953.852.751.750.749.748.747.746.845.945.558.457.356.155.053.952.951.850.849.848.847.946.946.045.658.657.456.355.254.153.052.051.049.949.048.047.146.145.758.757.656.455.354.253.252.151.150.149.148.147.246.345.858.957.756.655.554.453.352.351.250.249.248.347.346.445.959.157.956.855.654.553.552.451.450.449.448.447.446.5續(xù)表平均回彈值Rm測(cè)區(qū)混凝土強(qiáng)度換算值（MPa）平均碳化深度dm(mm)0.00.51.01.52.02.53.03.54.04.55.05.5≥6.046.059.258.156.955.854.753.652.651.550.549.548.547.646.646.159.458.257.156.054.953.852.751.750.749.748.747.746.846.259.658.457.256.155.053.952.951.850.849.848.847.846.946.359.758.657.456.355.254.153.052.050.949.948.948.047.046.459.958.757.656.455.354.253.152.151.150.149.148.147.246.560.058.957.756.655.554.453.352.251.250.249.248.247.346.6－59.057.956.755.654.553.452.451.450.349.348.447.446.7－59.258.056.955.854.753.652.551.550.549.548.547.646.8－59.458.257.055.954.853.752.751.650.649.648.647.746.9－59.558.357.256.155.053.952.851.850.849.848.847.847.0－59.758.557.456.255.154.053.051.950.949.948.947.947.1－59.858.757.556.455.354.253.152.151.050.049.048.147.2－－58.857.756.555.454.353.252.251.250.249.248.247.3－－59.057.856.755.654.553.452.351.350.349.348.347.4－－59.158.056.855.754.653.552.551.450.449.448.547.5－－59.358.157.055.954.853.752.651.650.649.648.647.6－－59.558.357.156.054.953.852.851.750.749.748.747.7－－59.658.457.356.255.154.052.951.950.849.848.847.8－－59.858.657.456.355.254.153.052.051.050.049.047.9－－59.958.857.656.555.354.353.252.151.150.149.148.0－－－58.957.756.655.554.453.352.351.250.249.248.1－－－59.157.956.855.654.553.552.451.450.449.448.2－－－59.258.056.955.854.753.652.551.550.549.548.3－－－59.458.257.155.954.853.752.751.650.649.648.4－－－59.558.457.256.155.053.952.851.850.849.848.5－－－59.758.557.456.255.154.053.051.950.949.948.6－－－59.858.757.556.455.354.253.152.051.050.048.7－－－－58.857.656.5