复合掺合料对水泥胶砂流动度和长期强度的影响

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发布时间：2020-01-06 00:00:00

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复合掺合料对水泥胶砂流动度和长期强度的影响

Effect of Composite Admixtures on Fluidity and Long-term Strength of Cement Mortar

2021年第1期

复合掺合料；流动度；长期强度；抗压强度；抗折强度

Composite; Fluidity; Long-term strength; Compressive strength; Flexural strength

2021年第1期

10.19761/j.1000-4637.2021.01.001.06

“十三五”国家重点研发计划资助项目（2017YFB0310001）。

蒋鹤1，李树繁1，王小明1，高超2,3，周永祥2,3，周郅人2,3

1.云南交投集团公路建设有限公司，云南昆明 650032；2.中国建筑科学研究院有限公司，北京 100013；3.建筑安全与环境国家重点实验室，北京 100013

蒋鹤1，李树繁1，王小明1，高超2,3，周永祥2,3，周郅人2,3

蒋鹤,李树繁,王小明,等.复合掺合料对水泥胶砂流动度和长期强度的影响[J].混凝土与水泥制品,2021(1),1-6.

JIANG H,LI S F,WANG X M,et al.Effect of Composite Admixtures on Fluidity and Long-term Strength of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):1-6.

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1000

摘要：采用粉煤灰（F）、矿渣粉（Sl）、硅灰（Si）和石灰石粉（L）复合组成5种复合矿物掺合料，研究了复合掺合料的组成和掺量对水泥胶砂流动度、长期抗压强度和抗折强度的影响。结果表明：掺粉煤灰和石灰石粉的FSlL和FL复合掺合料流动性较好，流动度比达到110%以上；掺硅灰的FSlSi和SlSiL复合掺合料流动性较差，流动度比在80%左右；5种复合掺合料在30%、40%、50%掺量下，胶砂试件720 d抗压强度和抗折强度均达到纯水泥试件的110%~120%；FSlSi、FSl和FL复合掺合料随着掺量的提高，长龄期胶砂抗压强度有所增加，抗折强度发展趋势与抗压强度相同；SlL和SlSiL复合掺合料随着掺量的提高，长龄期胶砂抗压和抗折强度均略有下降。 Abstract: Five kinds of composite admixtures were composed of fly ash (F), slag powder (Sl), silica fume (Si) and limestone powder (L) in varying proportions. The effects of composition and content of composite admixtures on fluidity, long-term compressive strength and flexural strength of cement mortar were studied. The research results show that the flow properties of FSlL and FL composite admixtures that contain fly ash and limestone powder are superior, and the fluidity ratio is above 110%. The flow properties of FSlSi and SlSiL composite admixtures with silica fume are inferior, and the fluidity is about 80%. The compressive strength and flexural strength of 720 d mortar specimen with five kinds of composite admixtures are 110%~120% of those of pure cement specimen when the dosages of composite admixtures separately are 30%, 40% and 50%. With the increase of the content of FSlSi, FSl or FL, the long-term compressive strength of mortar increases, and the development trend of flexural strength is the same as that of compressive strength. As the increase of the content of SlL and SlSiL, the long-term compressive strength and flexural strength of mortar decrease slightly.

英文名 : Effect of Composite Admixtures on Fluidity and Long-term Strength of Cement Mortar

刊期 : 2021年第1期

关键词 : 复合掺合料；流动度；长期强度；抗压强度；抗折强度

Key words : Composite; Fluidity; Long-term strength; Compressive strength; Flexural strength

刊期 : 2021年第1期

DOI : 10.19761/j.1000-4637.2021.01.001.06

文章编号 :

基金项目 : “十三五”国家重点研发计划资助项目（2017YFB0310001）。

作者 : 蒋鹤1，李树繁1，王小明1，高超2,3，周永祥2,3，周郅人2,3

单位 : 1.云南交投集团公路建设有限公司，云南昆明 650032；2.中国建筑科学研究院有限公司，北京 100013；3.建筑安全与环境国家重点实验室，北京 100013

蒋鹤1，李树繁1，王小明1，高超2,3，周永祥2,3，周郅人2,3

蒋鹤,李树繁,王小明,等.复合掺合料对水泥胶砂流动度和长期强度的影响[J].混凝土与水泥制品,2021(1),1-6.

JIANG H,LI S F,WANG X M,et al.Effect of Composite Admixtures on Fluidity and Long-term Strength of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):1-6.

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摘要

参数

结论

参考文献

引用本文

Abstract: Five kinds of composite admixtures were composed of fly ash (F), slag powder (Sl), silica fume (Si) and limestone powder (L) in varying proportions. The effects of composition and content of composite admixtures on fluidity, long-term compressive strength and flexural strength of cement mortar were studied. The research results show that the flow properties of FSlL and FL composite admixtures that contain fly ash and limestone powder are superior, and the fluidity ratio is above 110%. The flow properties of FSlSi and SlSiL composite admixtures with silica fume are inferior, and the fluidity is about 80%. The compressive strength and flexural strength of 720 d mortar specimen with five kinds of composite admixtures are 110%~120% of those of pure cement specimen when the dosages of composite admixtures separately are 30%, 40% and 50%. With the increase of the content of FSlSi, FSl or FL, the long-term compressive strength of mortar increases, and the development trend of flexural strength is the same as that of compressive strength. As the increase of the content of SlL and SlSiL, the long-term compressive strength and flexural strength of mortar decrease slightly.

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