新拌混凝土配合比快速分析方法综述

摘要/Abstract

摘要： 在一定的原材料和生产工艺下,配合比决定了产品的性能。新拌混凝土配合比的快速分析对提前控制混凝土的最终质量有重大意义。本文归纳了国内外对新拌混凝土中粗细集料、胶凝材料、水等关键材料用量的测定方法的原理及方法概要,分析了国标中配合比分析试验存在的问题,提出应采用微波法测定单位用水量,再用4.75和0.08 mm筛筛分出粗细集料后参考Dunagan法测定集料单位用量,然后用减量法计算出胶凝材料总量,并将选择性溶解法优化为溶解减量法以测定掺合料用量。此方法符合准确和快速的原则,可适用于搅拌站和施工现场的新拌混凝土配合比快速分析。

关键词: 新拌混凝土, 配合比分析, 微波法, 筛分法, 溶解减量法

Abstract: Under certain raw materials and production processes, the mix proportion determines the performance of the product. The rapid analysis of mix proportion of fresh concrete is of great significance to the control of the final quality of concrete in advance. This paper summarized the principles and methods of testing methods for the amount of key materials such as coarse and fine aggregates, cementitious materials, and water in fresh concrete at home and abroad, and analyzed the problems of former standards for mix proportion analysis tests. It is proposed to use the microwave method to determine the unit water content, and then sieve the coarse and fine aggregates with 4.75 and 0.08 mm sieves, then refer to the Dunagan method to determine the unit amount of aggregates. The reduction method is used to calculate the total amount of cementitious materials. The amount of mineral admixtures can be determined by dissolution reduction method, which is simplified from selective dissolution method. This whole set of method conforms to the principle of accuracy and rapidity, and can be applied to the rapid analysis of the mix proportion of fresh concrete in mixing stations and construction sites.

Key words: fresh concrete, mix proportion analysis, microwave method, sieving method, dissolution reduction method

中图分类号:

TU528.1

付镜, 刘家彬, 秦鸿根, 庞超明. 新拌混凝土配合比快速分析方法综述[J]. 硅酸盐通报, 2023, 42(2): 393-402.

FU Jing, LIU Jiabin, QIN Honggen, PANG Chaoming. A Review of Rapid Analysis Methods for Mix Proportion of Fresh Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(2): 393-402.

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