摘要
社会的不断发展带动着各个产业的不断的发展和提高，而随着建筑业的不断发展，对混凝土各个方面的要求也越来越高。不仅要求混凝土建筑材料对现代建筑有着高强度，耐热，耐酸，防水等性能要求，而且相应的对混凝土施工要求也有着更高的要求。在这样的条件下产生一种新型的混凝土施工工艺——泵送混凝土。
它是指混凝土从搅拌运输车或是储料斗中卸入混凝土泵中的料斗，利用泵的压力将混凝土从沿管道直接水平或是垂直输送到浇筑地点的工艺。相对于以前的而言，它具有传输能力大、速度快、高效率、能持续作业等特点。目前应用越来越广泛。国外都采用这种技术，目前我国的高层建筑和大体积基础混凝土中，也广泛采用这种技术，并取得很好的效果。
关键词：泵送混凝土，原材料，良好效果
Abstract
The continuous development of society to drive the continuous development of the industry and improve, and with the continuous development of construction industry, the requirements of all aspects of concrete more and more is also high. Not only requires concrete construction materials of modern architecture with high strength, heat resistance, acid resistance, waterproof performance requirements, such as and the corresponding construction requirements of concrete also have higher requirements. In such conditions to produce a new type of concrete construction technology of such types such types of pumping concrete.
It refers to from concrete mixing transporter or discharge in the storage hopper into the hopper of concrete pump, concrete by pump pressure directly from along the pipe horizontal or vertical to the casting process. Relative to the former, it has a large transmission capacity, high speed, high efficiency, can continuous operation, etc. The current application is more and more widely. Abroad are adopting this technology, at present our country of high-rise buildings and large volume concrete foundation, also widely used in this technique, and obtain good effect.
Key word：Pumped concrete, raw materials, good effect
目 录
摘要………………………………………………………………………………………………………… I
Abstract…………………………………………………………………………………………………… II
第2章 泵送混凝土……………………………………………………………………………….. 2
2．1 泵送混凝土的前景…………………………………………………………………… 2
2.2 混凝土的生产过程……………………………………………………………………… 2
2.2.1基本概念…………………………………………………………………………… 3
2.2.2原理………………………………………………………………………………….. 3
2.3 泵送混凝土的配置……………………………………………………………………. 3
2.3.1基本要求…………………………………………………………………………… 4
2.3.2 质量要求………………………………………………………………………….. 5
2.4泵送混凝土的影响………………………………………………………………………. 5
2.4.1积极影响…………………………………………………………………………… 6
2.4.2消极影响…………………………………………………………………………… 6
第3章 泵送混凝土的和易性理论及测定方法………………………………………… 7
3.1 基本概念……………………………………………………………………………………. 7
3.2 测定方法……………………………………………………………………………………. 7
3.2.1维勃稠度测定法………………………………………………………………… 7
3.2.2坍落度测定法……………………………………………………………………. 7
第四章 影响混泥土和易性因素及改善措施……………………………………………… 8
4.1水泥浆稠度…………………………………………………………………………………. 9
4.2砂率……………………………………………………………………………………………. 9
4.3水泥数量…………………………………………………………………………………….. 9
4.4水泥品种和骨料材质…………………………………………………………………… 9
4.5时间和温度……………………………………………………………………………….. 10
4.6外加剂………………………………………………………………………………………. 10
4.7 改善和易性措施……………………………………………………………………….. 10
结论………………………………………………………………………………………………………. 11
参考文献……………………………………………………………………………………………….. 12
致 谢…………………………………………………………………………………………………… 14
