發(fā)布時(shí)間：2018-04-13 23:18

  本文選題：可控性低強(qiáng)度材料 + 城市紅磚建筑垃圾再生細(xì)骨料　； 參考：《Journal of Southeast University(English Edition)》2017年04期

【摘要】：采用不同的灰砂比和水固比,利用富含城市紅磚的建筑垃圾再生細(xì)骨料制備了16種可控性低強(qiáng)度材料(CLSM).通過改進(jìn)的試驗(yàn)方法測(cè)試了新拌CLSM混合料的流動(dòng)性和泌水率,以及硬化后CLSM混合料的抗壓強(qiáng)度和耐久性.試驗(yàn)結(jié)果表明,利用城市紅磚建筑垃圾再生細(xì)骨料制備的CLSM混合料的流動(dòng)度在105～227 mm之間,相應(yīng)的泌水率在3.7%～15.5%之間,且隨流動(dòng)度的增加而增大.養(yǎng)護(hù)28 d后,硬化后CLSM混合料的抗壓強(qiáng)度可以達(dá)到1.15～13.96 M Pa,且其強(qiáng)度隨養(yǎng)護(hù)齡期的延長(zhǎng)仍能增大.而且,在相同的養(yǎng)護(hù)齡期,CLSM混合料的強(qiáng)度隨灰砂比的增加而增大,隨水固比的增加而減小.基于試驗(yàn)數(shù)據(jù),建立了以灰砂比和水固比為變量的抗壓強(qiáng)度預(yù)測(cè)模型,具有較好的精度.此外,有著更高灰砂比的CLSM混合料具有較好的耐久性.
[Abstract]:Using different ratio of lime to sand and water to solid, 16 kinds of controllable low strength materials were prepared by using recycled fine aggregate of city red brick.The fluidity and bleeding rate of fresh CLSM mixture, the compressive strength and durability of hardened CLSM mixture were tested by the improved test method.The experimental results show that the fluidity of CLSM mixture prepared from recycled fine aggregate of red brick construction waste is between 105 mm and 227 mm, and the corresponding bleeding rate is between 3.715% and 15.5%, and increases with the increase of flowability.After 28 days of curing, the compressive strength of hardened CLSM mixture can reach 1.15 ~ 13.96 MPA, and its strength can increase with the extension of curing age.In addition, the strength of CLSM mixture increases with the increase of lime-sand ratio and decreases with the increase of water-solid ratio at the same curing age.Based on the experimental data, a prediction model of compressive strength with the ratio of lime to sand and the ratio of water to solid is established, which has good accuracy.In addition, CLSM mixture with higher lime sand ratio has better durability.
【作者單位】： 北京工業(yè)大學(xué)交通工程北京市重點(diǎn)實(shí)驗(yàn)室;高速公路養(yǎng)護(hù)技術(shù)交通行業(yè)重點(diǎn)實(shí)驗(yàn)室(濟(jì)南);Department
【基金】：The National Science and Technology Support Program of China(No.2014BAC07B03) the Science and Technology Project of Transportation Committee of Beijing Government(No.2016-LZJKJ-01-006) the National Natural Science Foundation of China(No.51278016)
【分類號(hào)】：TU528

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