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大流動(dòng)混凝土正交試驗(yàn)對(duì)其和易性影響因素研究與分析

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摘 要:大流動(dòng)性混凝土定義為拌和物坍落度不低于160 mm的混凝土。在混凝土工程應(yīng)用中,大流動(dòng)混凝土拌和物的工作性容易發(fā)生泌水、離析等不良現(xiàn)象,造成這些不良現(xiàn)象的原因有很多:水泥成分,砂石料集配、粒徑、有害物質(zhì),摻和料的摻量,單位用水量,外加劑與水泥在相容性以及溫濕度外界因素等。

關(guān)鍵詞:大流動(dòng)混凝土;泌水;坍落度;外加劑;摻和料

中圖分類號(hào):TU528     文獻(xiàn)標(biāo)志碼:A     文章編號(hào):1003-5168(2022)10-0055-04

DOI:10.19968/j.cnki.hnkj.1003-5168.2022.10.012

Research and Analysis on Influencing Factors of Workability of Large Flow Concrete by Orthogonal Test

HAO Xiangdong1    WANG Xinyan2    SHAO Jinggan1

(1.Henan Jiaoyuan Engineering Technology Group Co.,Ltd., Research and Development Center of Green High Performance Material Application Technology Transportation Industry ,Zhengzhou 450046, China;

2. Henan Jianyuan Highway Ancillary Facilities Engineering Co., Ltd.,Xinxiang  453400 ,China)

Abstract:Large flow concrete is defined as the slump of the mixture is not less than 160 mm in concrete. Concrete engineering applications, the big flow the workability of concrete mixture are prone to bleeding, as well as the segregation phenomenon, there are a lot of the bad phenomena: the cement composition, the application of distribution, particle size and harmful substances, dosage of admixture, unit water consumption, additive compatibility with cement and external factors such as temperature and humidity.

Keywords: large flow concrete; bleeding water; slump; admixture; admixture

0 引言

大流動(dòng)性混凝土由于其高流動(dòng)性能、良好的工作性能等被普遍應(yīng)用于工程各個(gè)方面,然而其大流動(dòng)性能在較干硬性混凝土和塑性混凝土中容易發(fā)生泌水、離析等不良現(xiàn)象,造成混凝土的工作性差,后期力學(xué)性能、耐久性能和體積穩(wěn)定性得不到足夠的保證。(剩余3779字)

目錄
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