摘要
研究了养护方式、养护龄期、镁质高性能抗裂剂掺量、矿物掺合料等因素对砂浆强度的影响规律;采用灰熵理论方法分析影响砂浆强度的显著因素,并分析了镁质高性能抗裂剂等材料对砂浆强度影响的微观机理。结果表明,合适掺量的镁质高性能抗裂剂可提高砂浆试件抗压强度,但当其掺量较多时,试件的抗压强度有所降低。养护条件对试件抗压强度存在显著影响,覆膜养护与标准养护试件的抗压强度相差不大,自然养护条件下试件的抗压强度显著降低。镁质高性能抗裂剂通过影响试件内部裂纹宽度与长度、水化产物数量,进而影响其宏观力学性能。
The research on the effect of maintenance method,maintenance age,magnesium high performance anti-cracking agent dosing,mineral admixture and other factors on the strength of mortar was carried out;the significant factors affecting the strength of mortar were analyzed by the method of gray entropy theory,and the microscopic mechanism of the effect of magnesium high performance anti-cracking agent and other materials on the strength of mortar was analyzed.The results show that the suitable amount of magnesium high-performance anti-cracking agent can improve the compressive strength of mortar specimens,but when the amount is higher,the compressive strength of specimens is reduced.There is a significant effect of maintenance conditions on the compressive strength of the specimens,the difference between the compressive strength of the specimens maintained by film and standard maintenance is not significant,and the compressive strength of the specimens under exposed conditions is significantly reduced.The magnesium high-performance anti-cracking agent affects the macroscopic mechanical properties of the specimen by influencing the length and number of cracks,the number of hydration products inside the specimen.
作者
何江红
薛翠真
刘玉果
罗丹
HE Jianghong;XUE Cuizhen;LIU Yuguo;LUO Dan(China State Construction Engineering Corporation,Beijing 100020,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《新型建筑材料》
2023年第2期7-10,27,共5页
New Building Materials
基金
国家自然科学基金青年科学基金项目(52108219)
甘肃省青年科技基金项目(20JR5RA440)
中国建筑第四工程局有限公司科技项目(1602202000219004)。
关键词
大体积混凝土
膨胀剂
强度
灰熵理论
影响机理
mass concrete
expanding agent
strength
gray entropy theory
influence mechanism
