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A Study on Curing Properties of Concrete of Containing Large Quantity of Fly Ash

大量粉煤灰混凝土的养护性能研究

基本信息

批准号：
18560558
负责人：
MATSUFUJI Yasunori
金额：
$ 2.34万
依托单位：
The University of Kitakyushu
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560558/
关键词：
fly ash slurry containing large quantity of fly ash curing properties compressive strength experiment at ready mixed concrete plant temuerature history フライアッシュ

项目摘要

(1) The Laboratory ExperimentIn this study, it was experimented concerning the strength of concrete containing large quantity of fly ash under 40 degrees centigrade air curing was severe with concrete, in two levels (cement content per unit volume of concrete of the normal strength concrete area and the high-strength concrete area). The conclusions are as follows. When the mixed quantity of fly ash was too large, it was clarified not to show the compressive strength improvement when the cement content per unit volume of concrete was large. When it mixed with concrete up to the fly ash content per unit volume of concrete about 100 kg/m^3 when the cement content per unit volume of concrete was large, and it made it to standard curing, the expression of compressive strength was optimal. And the effect is a little even if it mixes it any more. The compressive strength of concrete at the cement content per unit volume of concrete 600kg/m^3 or more showed about 100N/mm^2 in standard curing. But compressive strength under 40 degrees centigrade air curing was severe with concrete was shown about 80N/mm^2. When it mixed with concrete up to the fly ash content per unit volume of concrete about 200 kg/m^3, the concrete of 40 degrees centigrade air curing showed almost same compressive strength (110N/m^2 in this experiment)as standard curing.(2) Experiment at Ready-mixed Concrete PlantIn the ready mixed concrete producer in Okinawa Prefecture, The fly ash exhausted in Okinawa Prefecture was slurried. The simulated column specimen was made by using concrete containing large quantity fly ash slurry. And the strength properties of it was clarified. The conclusions are as follows. In actual mixer experiment at ready-mixed concrete plant, the concrete containing large quantity the fly ash slurry showed compressive strength that was higher than the concrete no containing fly ash slurry.

(1)室内试验在本研究中，对40 ℃空气养护条件下的大掺量粉煤灰混凝土强度进行了严格的试验，试验分为两个水平（普通强度混凝土区和高强混凝土区的单位体积水泥含量）。研究结论如下。当粉煤灰的混合量太大时，澄清了当混凝土的单位体积的水泥含量大时不显示抗压强度的提高。当其掺入混凝土中达到单位体积粉煤灰掺量100 kg/m^3左右时，单位体积水泥掺量较大，并使其达到标准养护时，其抗压强度表现最佳。即使再混合，效果也会有点。当混凝土单位体积水泥用量为600 kg/m^3或更高时，标准养护时混凝土的抗压强度约为100 N/mm^2。但在40 ℃空气养护下混凝土的抗压强度严重，约为80 N/mm^2。当单位体积粉煤灰掺量达到200 kg/m^3时，40 ℃自然养护的混凝土抗压强度与标准养护的混凝土相当（本试验为110 N/m^2）。(2)在预拌混凝土工厂的试验在冲绳县的预拌混凝土生产商中，将冲绳县排出的粉煤灰制成浆料。采用大掺量粉煤灰浆体混凝土制作了模拟柱试件。并阐明了其强度特性。研究结论如下。在预拌混凝土厂的实拌试验中，掺量大的粉煤灰浆体混凝土的抗压强度高于不掺粉煤灰浆体的混凝土。