湿喷混凝土配合比优化的研究及应用_《混凝土与水泥制品》杂志社

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湿喷混凝土配合比优化的研究及应用

Research on Mix Proportion Optimization of Wet Shotcrete and Application

2020年第9期

湿喷混凝土；可泵性；正交试验；最优配合比

Wet shotcrete; Pump property; Orthogonal test; Optimum mix proportion

2020年第9期

10.19761/j.1000-4637.2020.09.016.04

国家自然科学基金项目（51874123）。

严少洋1,2，闫松3，刘永胜4

1.河南理工大学土木工程学院，河南焦作 454000；2.河南省地下工程与灾变防控重点实验室，河南焦作 454000；3.河南理工大学基建处，河南焦作 454000；4.中铁隧道局集团有限公司勘察设计研究院，广东广州 511400

严少洋1,2，闫松3，刘永胜4

严少洋,闫松,刘永胜.湿喷混凝土配合比优化的研究及应用[J].混凝土与水泥制品,2020(9):16-19.

YAN SY,YAN S,LIU Y S.Research on Mix Proportion Optimization of Wet Shotcrete and Application[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):16-19.

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1000

摘要：针对某金矿破碎、易风化的围岩支护难度大等特点，采用湿喷混凝土技术实施机械化施工。研究了水泥掺量、纤维掺量、水灰比及砂率对湿喷混凝土可泵性及强度的影响。并通过正交试验方法，讨论了掺合料对湿喷混凝土坍落度、扩展度、抗压与抗折强度的影响规律。结果表明：增加水灰比能显著提高湿喷混凝土的坍落度，纤维用量增大对强度变化不明显但其对扩展度影响较大；砂率增大虽然能够增大混凝土的流动性但是强度呈下降趋势；通过极差分析结果得出了影响混凝土强度的显著因素及最优配合比，该配合比成功应用于实际工程。 Abstract: Aiming at the characteristics of crushing and weathering surrounding rock which was difficult to support of a gold mine, the wet shotcreting technology was applied to carry out mechanized construction. The effects of cement content, fiber content, water-cement ratio and sand ratio on the pump ability and strength of wet shotcrete as well as the effects of admixture on slump, extension, compression strength and flexural strength of wet shotcrete were studied by orthogonal test. The results show that the slump of wet shotcrete can be significantly increased by increasing the water-cement ratio, and the increase of fiber content has no obvious effect on the strength but has a great influence on extension. Although the increase of sand ratio can increase the fluidity of concrete, it shows a downward trend to the strength. Through range analysis, the significant factors affecting the strength of concrete and the optimal mix proportion are obtained. The mix proportion has been successfully applied to practical engineering.

英文名 : Research on Mix Proportion Optimization of Wet Shotcrete and Application

刊期 : 2020年第9期

关键词 : 湿喷混凝土；可泵性；正交试验；最优配合比

Key words : Wet shotcrete; Pump property; Orthogonal test; Optimum mix proportion

刊期 : 2020年第9期

DOI : 10.19761/j.1000-4637.2020.09.016.04

文章编号 :

基金项目 : 国家自然科学基金项目（51874123）。

作者 : 严少洋1,2，闫松3，刘永胜4

单位 : 1.河南理工大学土木工程学院，河南焦作 454000；2.河南省地下工程与灾变防控重点实验室，河南焦作 454000；3.河南理工大学基建处，河南焦作 454000；4.中铁隧道局集团有限公司勘察设计研究院，广东广州 511400

严少洋1,2，闫松3，刘永胜4

严少洋,闫松,刘永胜.湿喷混凝土配合比优化的研究及应用[J].混凝土与水泥制品,2020(9):16-19.

YAN SY,YAN S,LIU Y S.Research on Mix Proportion Optimization of Wet Shotcrete and Application[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):16-19.

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摘要

参数

结论

参考文献

引用本文

Abstract: Aiming at the characteristics of crushing and weathering surrounding rock which was difficult to support of a gold mine, the wet shotcreting technology was applied to carry out mechanized construction. The effects of cement content, fiber content, water-cement ratio and sand ratio on the pump ability and strength of wet shotcrete as well as the effects of admixture on slump, extension, compression strength and flexural strength of wet shotcrete were studied by orthogonal test. The results show that the slump of wet shotcrete can be significantly increased by increasing the water-cement ratio, and the increase of fiber content has no obvious effect on the strength but has a great influence on extension. Although the increase of sand ratio can increase the fluidity of concrete, it shows a downward trend to the strength. Through range analysis, the significant factors affecting the strength of concrete and the optimal mix proportion are obtained. The mix proportion has been successfully applied to practical engineering.

关键词:

优化

the

混凝土

and

strength

强度

wet

影响

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