土木專業(yè)英語摘要翻譯

1、 專業(yè)英語摘要翻譯課程作業(yè) 專業(yè)： 年級(jí)： 姓名： 學(xué)號(hào)： *大學(xué)土木工程學(xué)院 2015 年 6 月Preparation of C200 green reactive powder concrete and its static-dynamic behaviorsC200綠色活性粉末混凝土的制備和它的靜力、動(dòng)力性能的研究AbstractIn this paper, a new type of green reactive powder concrete (GRPC) with compressive strength of 200 MPa(C200 GRPC) is prepared by

2、utilizing composite mineral admixtures, natural fine aggregates, short and fine steel fibers. The quasi-static mechanical properties (mechanical strength, fracture energy and fibermatrix interfacial bonding strength) of GRPC specimens, cured in three different types of regimes(standard curing, steam

3、 curing and autoclave curing), are investigated. The experimental results show that the mechanical properties of the C200 GRPC made with the cementitious materials consisting of 40% of Portland cement, 25% of ultra fine slag, 25% of ultra fine fly ash and 10% of silica fume, 4% volume fraction of st

4、eel fiber are higher than the others. The corresponding compressive strength, flexural strength, fracture energy and fibermatrix interfacial bonding strength are more than 200 MPa,60 MPa, 30,000 J/m2 and 14 MPa, respectively. The dynamic tensile behavior of the C200 GRPC is also investigated through

5、 the Split Hopkinson Pressure Bar (SHPB) according to the spalling phenomena.The dynamic testing results demonstrate that strain rate has an important effect on the dynamic tensile behavior of C200 GRPC. With an increase of strain rate, the peak stress rapidly increases in the dynamic tensile stress

6、time curves. The C200 GRPC exhibits an obvious strain rate stiffening effect in the case of high strain rate. Finally, the mechanism of excellent static and dynamic properties gains of C200 GRPC is also discussed.摘要：本文，使用合成礦物外加劑、天然細(xì)骨料、短細(xì)鋼纖維制備了一種抗壓強(qiáng)度200MPa的綠色活性粉末混凝土（GRPC）。研究了GRPC樣本在三種不同養(yǎng)護(hù)制度下（標(biāo)準(zhǔn)養(yǎng)護(hù)、蒸汽養(yǎng)

7、護(hù)、蒸壓養(yǎng)護(hù)）的擬靜力性能（力學(xué)強(qiáng)度、斷裂能力和纖維矩陣界面粘合強(qiáng)度）。實(shí)驗(yàn)結(jié)果表明由膠結(jié)材料（包括40%波特蘭水泥、25%超細(xì)爐渣、25%超細(xì)飛灰和10%硅粉、4%容積率的鋼纖維）制成的C200 GRPC的力學(xué)性能比其它的高。相應(yīng)的抗壓強(qiáng)度超過200MPa，抗彎強(qiáng)度超過60MPa，斷裂能力超過30000J/m2，纖維矩陣界面粘合強(qiáng)度超過14MPa。根據(jù)剝落現(xiàn)象,通過分離式霍普金森壓桿研究了C200 GRPC的動(dòng)力抗拉性能。動(dòng)力測(cè)試結(jié)果表明應(yīng)變率對(duì)C200 GRPC相應(yīng)的動(dòng)力抗拉性能有重要影響。在動(dòng)力抗拉應(yīng)力-時(shí)間曲線上，隨應(yīng)變率提高，峰值應(yīng)力很快提高。在高應(yīng)變率情況下，C200 GRPC展示

8、了明顯的應(yīng)變率硬化效果。最后，本文也討論了C200 GRPC良好的靜力和動(dòng)力性能增加機(jī)理。Influence of aggregate and curing regime on the mechanical properties of ultra-high performance fibre reinforced concrete (UHPFRC)骨料和養(yǎng)護(hù)制度對(duì)超高性能纖維加固混凝土力學(xué)性能影響的研究AbstractA new generation of concrete, ultra-high performance fibre reinforced concrete (UHPFRC) h

9、as been developed for its outstanding mechanical performance and shows a very promising future in construction applications. In this paper, several possibilities are examined for reducing the price of producing UHPFRCand for bringing UHPFRC away from solely precast applications and onto the construc

10、tion site as an in situ material. Recycled glass cullet and two types of local natural sand were examined as replacement materials for the more expensive silica sand normally used to produce UHPFRC. In addition, curing of UHPFRC cubes and prisms at 20 oC and 90 oC has been investigated to determine

11、differences in both mechanical and ductility.The results showed that using more angular sand particles reduces the flowability of fresh UHPFRC. The local natural sand can produce a similar mechanical and ductility of UHPFRC to the silica sand. However,the use of Recycled Glass Cullet (RGC) gives app

12、roximately 15% lower performance, i.e. flexural strength,compressive strength and fracture energy. Specimens cured at 20 oC give approximately 20% lower compressive strength, 10% lower flexural strength and 15% lower fracture energy than specimens cured at 90 oC from 1 to 7 days.摘要： 作為一種新的混凝土，超高性能纖維

13、加固混凝土（UHPFRC）由于突出的力學(xué)性能而被發(fā)展，在施工應(yīng)用方面有很大的潛力。本文驗(yàn)證了降低UHPFRC的成本，把UHPFRC從單獨(dú)預(yù)制應(yīng)用轉(zhuǎn)移到施工場(chǎng)地作為原產(chǎn)地材料的可能性。再生玻璃和兩種天然砂代替了更昂貴、通常用來生產(chǎn)UHPFRC的石英砂。此外，研究了UHPFRC立方體和棱柱體在20攝氏度和90攝氏度的養(yǎng)護(hù)來確定力學(xué)和延性差異。 研究表明使用更多礫砂減少了UHPFRC的流動(dòng)性。比起石英砂，天然砂可以使UHPFRC產(chǎn)生相似的力學(xué)和延性。然而，再生玻璃的使用大約降低了15%的性能，包括抗彎強(qiáng)度、抗壓強(qiáng)度和斷裂能力。1到7天強(qiáng)度，比起90攝氏度養(yǎng)護(hù)下的樣本，20攝氏度養(yǎng)護(hù)下的樣本大約降低2

14、0%抗壓強(qiáng)度，10%抗彎強(qiáng)度和15%的斷裂能力。Effects of w/c ratio and curing conditions on strength development inBRECEM concretes水灰比和養(yǎng)護(hù)制度對(duì)BRECEM混凝土強(qiáng)度發(fā)展的影響的研究AbstractThe early strength development of BRECEM concretes, made from 50:50 mixtures of calcium aluminate cement (CAC) and ground granulated blastfurnace slag (ggb

15、s), using 100-mm cubes at w/c ratios of 0.35 and 0.45, has been studied. BRECEM concretes showed good strength development at both w/c ratios whether water cured or air cured. In contrast, longer-term studies with 1-m cubes cured under near-adiabatic conditions have indicated that mass BRECEM concre

16、tes of similar binder composition may gain compressive strength relatively slowly. This is primarily due to the heat of hydration of the CAC component, which can lead to temperatures of up to 60 oC, resulting in rapid hydration and conversion of the calcium aluminate component. However, the performance of 40 CAC/60 ggbs concrete under these near-adiabatic conditions has proved to be satisfactory over a period of 5 years, with similar strength development to that of equivalent 100-mm cubes stored under ambient conditions. 摘要：本文研究了BRECEM混凝土100mm立方體試塊的早期強(qiáng)度發(fā)展，混凝土用50比50的鋁酸鈣