破碎陶粒混凝土的试验研究

陶粒作为绿色建筑材料具有良好的社会和经济效益。但由于我国生产的陶粒普遍存在粒径偏大、级配不良以及表面较光滑等缺陷使得陶粒混凝土分层离析现象严重。通过试验研究,采用破碎的方式得到具有良好级配的陶粒;相对于完整陶粒混凝土,破碎陶粒混凝土分层离析现象得到明显改善;破碎陶粒混凝土不仅满足工程可泵性要求,其强度相对于完整陶粒混凝土而言也有所提高。针对大流动性破碎陶粒混凝土在低温下是否满足强度要求进行了试验研究,试验表明,陶粒混凝土在低温-25℃下较常温20℃下强度所有提高。

EXPERIMENT RESEARCH ON CRUSHED CERAMSITE CONCRETE

As the green building material,ceramsite has good social and economic benefits.But the ceramsite produced in China has the problems of large size,bad gradation and smooth surface,which lead to segregation of ceramsite concrete.By means of experimental study,a good gradation lightweight aggregate can be obtained by crushing the ceramsite.The results show that the segregation of crushed ceramsite concrete is improved compared with the complete ceramsite concrete.At the same time the crushed ceramsite concrete meets not only the requirements of pumpability but also can improve strength.In addition,this paper focuses on the cube compressive strength that whether the high fluidity crushed ceramsite concrete can meet the requirements of strength at low temperature-25 ℃,the comparative tests of the strength at room temperature 20 ℃ and low temperature-25 ℃ indicate the strength of the latter is improved,which shows high fluidity crushed ceramsite concrete meets the requirement of strength.