冻融循环对纳米再生混凝土抗压强度影响试验研究  

Experimental study on the compressive strength of nanomaterial recycled concrete under freeze-thaw cycles

作　　者：关瑞[1] 刘元珍[2] 吕丹丹[2] 

机构地区：[1]山西职业技术学院建筑工程系,山西太原030013 [2]太原理工大学建筑与土木工程学院,山西太原030024

出　　处：《混凝土》2018年第2期98-101,共4页Concrete

基　　金：国家自然科学基金项目(51308371)

摘　　要：纳米再生混凝土是一种新型高性能的绿色建材,通过对再生混凝土进行室内快速冻融试验,分析了冻融循环次数、纳米材料和龄期对其抗压强度的影响规律。试验结果表明,经过冻融循环后纳米再生混凝土的强度有所降低,运用回归分析法确定了冻融次数和抗压强度之间的定量规律;经过纳米强化的再生混凝土,其抗压强度有较大幅度的提高,尤其是早期强度;再生混凝土的早期强度较大,后期强度增长速度较为缓慢。Nanomaterial recycled concrete is a new type of high-performance green building materials.The indoor rapid freeze-thaw test of recycled concrete has been done and the influence of freeze-thaw cycles, nanomaterial and ages to its compressive strength has been analyzed.Test results have showed that the recycled concrete strength decreased after freeze-thaw cycles and the quantitative relational expression between concrete strength and freeze-thaw cycles times was determined.The compressive strength of recycled concrete after nanomaterial-reinforced has dramatically increased, especially early strength.The early strength of recycled concrete is large, but the late strength grows relatively slow.

关 键 词：再生混凝土 冻融循环 抗压强度 纳米材料 

分 类 号：TU528.041[建筑科学—建筑技术科学]