摘要
研究了粉煤灰、矿渣、硅灰掺合料对大流动性轻集料混凝土性能的影响。试验结果表明 ,掺合料单掺效果不及复掺 ;用堆积密度为 50 3kg/m3 、筒压强度为 3 .0 8MPa的页岩陶粒 ,复合掺入 2 0 %的磨细粉煤灰和 2 0 %的磨细矿渣 ,可配制出塌落度 2 67mm、扩展度650mm ,2 8d强度为 2 8.8MPa,表观密度为 1 80 4kg/m3 的免振捣大流动性轻集料混凝土 ;轻集料的物理力学性能对大流动性轻集料混凝土的性能有重要影响。
In this paper, the influence of fly ash (FA), blast furnace slag (BS) and silica fume (SF) on the properties of lightweight aggregate concrete (LAC) with high fluidity were studied. Results show that in LAC the effects of composite additives are better than that of single additive. The slump of LAC with apparent density of 1 840 kg/m 3 could reach 267 mm and the spread 650 mm. The 28d strength is 28.8 MPa for LAC with 20% ground FA and 20% BS as additives and the shale ceramsite with bulk density of 503 kg/m 3 and crushing strength 3.1 MPa was used as aggregate. Physical properties of lightweight aggregate have significant effects on durability of the flowing LAC.
出处
《重庆建筑大学学报》
CSCD
2002年第3期91-95,共5页
Journal of Chongqing Jianzhu University
关键词
流动性
轻集料混凝土
掺合料
fluidity
lightweight aggregate concrete
additive
