CAJ | 학술논문

试验采用大掺量矿物掺和料以及聚羧酸高效减水剂,研究了绿色混凝土的早期抗裂性能.结果表明：随着胶凝材料用量的增加,裂缝面积及最大裂缝宽度增大;同胶凝材料用量时,单掺矿粉系列混凝土的开裂面积达到单掺粉煤灰系列的2～4倍,最大裂缝宽度约达到粉煤灰系列的2倍;提高水泥用量或复掺超细矿粉时,混凝土强度提高,但早期抗裂性能降低;复掺抗裂防水剂时,早期养护不充分条件下,混凝土的抗裂性能显著降低;早期养护对绿色混凝土的抗裂性能有较大的影响,实际生产中采用绿色混凝土,将表现出优异的抗裂性能.
시험채용대참량광물참화료이급취최산고효감수제,연구료록색혼응토적조기항렬성능.결과표명：수착효응재료용량적증가,렬봉면적급최대렬봉관도증대;동효응재료용량시,단참광분계렬혼응토적개렬면적체도단참분매회계렬적2～4배,최대렬봉관도약체도분매회계렬적2배;제고수니용량혹복참초세광분시,혼응토강도제고,단조기항렬성능강저;복참항렬방수제시,조기양호불충분조건하,혼응토적항렬성능현저강저;조기양호대록색혼응토적항렬성능유교대적영향,실제생산중채용록색혼응토,장표현출우이적항렬성능.
The early anti-cracking behaviors of the green concrete which is added to large dosage different mineral adixtures and polycarboxylic high-performance water-reducing agent are studied in this paper.The results go as follows： with the increase in the amount of cementitious material,the cracking area and the maxium cracking width of the concrete increase,when general slag is singly added,the crack area is 2～4 times that of singly adding fly ash,while the maxium width is about 2 times;when superfine slag is added,the strength can be improved but the ant-cracking performance is reduced.If adding waterproof admixture under the condition of the maintenance inadequate in early stage,the anti-cracking performance significantly reduces;curing conditions of early stage have a great influence on the anti-cracking performance.If effective conservation is conducted in early stage,the green concrete shows excellent anti-cracking performance.