EXPERIMENT RESEARCH ON CRUSHED CERAMSITE CONCRETE
-
摘要: 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。Abstract: 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.
-
Key words:
- ceramsite concrete /
- complete ceramsite /
- crushed ceramsite /
- pumpability /
- strength ?
-
[2] 刘登宇,郭峰.泵送轻集料混凝土配合比及施工技术研究[J].山西建筑,2009,35(9):161-162. 于萍.粉煤灰陶粒混凝土的性能研究[D].大连:大连交通大学,2009. [3] 罗杰.轻集料的改性处理及其混凝土性能研究[D].重庆:重庆大学,2011. [4] 李渝军,建彤.泵送高强轻骨料混凝土的抗离析性能的试验研究.四川建筑科学研究[J].2005,31(5):103-107. [5] Michael F Petrou, Kent A Harries. A Unique Experimental Method for Monitoring Aggregate Settlement in Concrete[J]. Cement and Concrete Research,2000,30(5):809-816. [6] 彭卫.泵送轻集料混凝土工作性能控制技术探讨[J].浙江建筑,2011,28(9):64-68. [7] 胡曙光,王发洲.轻集料混凝土[M].北京:化学工业出版社,2006. [8] 中冶天工建设有限公司.一种陶粒混凝土可泵性的检测方法[P].中国专利: CN102269685 A,2011-12-07. [9] 张永明,朱涵,杨林虎.低温下等强橡胶集料混凝土的脆性初探[J].天津大学学报,2009,43(3):189-193. [10] 王传星,谢剑,李会杰.低温环境下混凝土性能的试验研究[J].工程力学,2011,28(SⅡ):182-185.
点击查看大图
计量
- 文章访问数: 94
- HTML全文浏览量: 6
- PDF下载量: 68
- 被引次数: 0