预拌混凝土坍落度损失规律及控制技术研究

发布时间：2018-02-27 03:04

本文关键词： 预拌混凝土抗压强度坍落度损失技术控制　出处：《河北工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：商品混凝土一般为流态且可泵送的混凝土,混凝土的流变性能一般以坍落度来综合评判,坍落度是混凝土拌和物的粘聚性、流动性和稳定性等指标的综合表现。施工混凝土坍落度控制是技术指标中的一个硬性指标,由于水泥沉伏时间不同、不同季节的气候变化、掺合料、外加剂变化等对混凝土坍落度的影响很大,控制起来比较困难。本论文以沧州地区上千余组C15 C40商品混凝土的工作特性和力学行为试验数据为基础,研究不同配合比、不同原材料对混凝土工作性能试验和试块进行立方体抗压强度试验的影响规律和预拌商品混凝土坍落度损失的问题,尤其是影响混凝土坍落度损失的主要因素;通过试验和商品混凝土工作特性跟踪,对影响混凝土坍落度损失因素排序,根据影响混凝土坍落度损失的主要因素提出了控制混凝土坍落度损失的对应方法。通过对预拌混凝土坍落度损失影响因素的研究,探讨预拌混凝土坍落度损失规律及制定正确的控制方法,为今后预拌混凝土的拌制和施工提供参考依据,更好的服务于用户。
[Abstract]:Commercial concrete is generally flow state and can be pumped concrete, the rheological properties of concrete are generally judged by slump, slump is the cohesion of concrete mixture, Comprehensive performance of fluidity and stability. Slump control of construction concrete is one of the technical indicators. Because of different settling time of cement, climate change in different seasons, admixture, The change of admixture has a great influence on the slump of concrete, so it is difficult to control it. Based on the working characteristics and mechanical behavior test data of more than 1000 groups of C15 and C40 commercial concrete in Cangzhou area, the different mix ratio is studied in this paper. The influence of different raw materials on concrete performance test and cube compressive strength test, and the problem of slump loss of ready-mixed concrete, especially the main factors affecting concrete slump loss; By testing and tracking the working characteristics of commercial concrete, the factors affecting the slump loss of concrete are sorted. According to the main factors affecting slump loss of concrete, the corresponding method of controlling slump loss of concrete is put forward. This paper probes into the law of slump loss of ready-mixed concrete and formulates the correct control method, which provides a reference for the mixing and construction of ready-mixed concrete in the future and serves the users better.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU528.52

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