摘要
随着高效碱水剂和矿物掺合料的大量使用,由于矿物掺合料与水泥的密度相差较大,计算混凝土配合比的假定密度法不再适用,应当使用绝对体积法;全世界只有我国现行使用的是以骨料绝干密度为基准的方法,造成较大的质量管理难度。骨料质量成了影响混凝土质量的主要因素,需充分重视。改变矿物掺合料掺量时,应当保持浆骨比不变,以保持混凝土的体积稳定性。
Because of utilization largely on superplastisizer and mineral admixtures,the traditional method of presumptive density for design on mix proportion of concrete can not be feasible in general use;Method based on absolute dried aggregate resulted in difficulty to quality control,which is used only in China on the world;Method of absolute volume must be used for calculating mix proportion of concrete,and aggregate used should be with dry surface and saturated water.Quality of aggregates have become the key factor to affec ring quality of concrete, significance must be recognized adequately.When dosage of mineral admixtures were changed, the paste to aggregate ratio should be kept constant for keeping volume stability of concrete.
出处
《混凝土》
CAS
CSCD
北大核心
2009年第3期1-5,共5页
Concrete
关键词
混凝土配合比
绝对体积法
骨料的饱和面干
等浆体体积
粗骨料级配与粒形
mix proportion of concrete
method of absolute volume
aggregate with dry surface and saturated water
equal volume of paste grading and grain shape of coarse aggregate
