不同岩性石粉-水泥复合胶凝材料性能研究

材料导报

2021, Vol. 35

Issue (Z1): 211-215

无机非金属及其复合材料

不同岩性石粉-水泥复合胶凝材料性能研究

孙茹茹^1,2, 王振^1,2, 黄法礼^1,2, 易忠来^1,2, 袁政成^1,2, 谢永江^1,2, 李化建^1,2

1 中国铁道科学研究院集团有限公司铁道建筑研究所,北京 100081
2 高速铁路轨道技术国家重点实验室,北京 100081

Study on Properties of Different Lithology Stone Powder-Cement Composite Cementitious Materials

SUN Ruru^1,2, WANG Zhen^1,2, HUANG Fali^1,2, YI Zhonglai^1,2, YUAN Zhengcheng^1,2, XIE Yongjiang^1,2, LI Huajian^1,2

1 Railway Engineering Research Institute, China Academy of Railway Sciences Corporation limited, Beijing 100081, China
2 State Key Laboratory for Track Technology of High-Speed Railway, Beijing 100081, China

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摘要为探明石灰岩、花岗岩、石英岩和凝灰岩石粉用作混凝土矿物掺合料的可行性,采用X射线衍射仪、Zeta电位仪和总有机碳分析仪分别测定了不同岩性石粉的矿物组成、Zeta电位和减水剂吸附率,研究了石粉-水泥二元复合胶凝材料和石粉-粉煤灰/矿渣粉-水泥三元复合胶凝材料净浆和胶砂的工作性能和力学性能。结果表明:石粉的矿物组成对Zeta电位和减水剂吸附率影响较大,沸石矿物疏松结构使凝灰岩石粉的Zeta电位和减水剂吸附作用随时间变化明显,云母矿物的插层吸附使花岗岩石粉对减水剂的吸附作用明显。不同岩性石粉对复合胶凝材料浆体工作性能的影响与石粉对减水剂的吸附性能密切相关。不同岩性石粉-水泥复合胶凝材料胶砂的抗压强度比和抗折强度比均高于60%,且石粉增加了水泥胶砂的折压比,提高了胶砂试件的韧性。

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	孙茹茹
	王振
	黄法礼
	易忠来
	袁政成
	谢永江
	李化建

关键词: 石粉岩性胶凝材料工作性能力学性能

Abstract: In order to explore the feasibility of limestone, granite, quartzite and tuff powder as mineral admixture for concrete, the mineral composition, Zeta potential and superplasticizer adsorption rate of stone powder with different lithology were measured by the X-ray diffractometer, Zeta potential analyzer and total organic carbon analyzer. The workability and mechanical properties of the paste and mortar of stone powder-cement binary composite cementitious materials and stone powder-fly ash/slag powder-cement ternary composite cementitious materials were studied. The results show that the mineral composition of stone powder has great influence on Zeta potential and superplasticizer adsorption rate. Zeta potential and superplasticizer adsorption rate of tuff powder change obviously with the increase of time due to the loose structure of zeolite minerals. The intercalation adsorption of mica minerals makes the obvious superplasticizer adsorption of granite powder. The effect of different lithology stone powder on the workability of composite cementitious material paste is closely related to the superplasticizer adsorption of stone powder. The compressive strength ratio and bending strength ratio of different lithology stone powder-cement composite cementitious materials are all higher than 60%, and the stone powder increases the flexural pressure ratio of cement mortar and improves the toughness of the mortar specimen.

Key words: stone powder lithology cementitious materials workability mechanical property

发布日期: 2021-07-16

ZTFLH:

TU528

基金资助: 国家自然科学基金(U1934206);国铁集团科技研究开发计划(P2019G001);国家重点研发计划(2018YFC0705401)

通讯作者: chinasailor@163.com

作者简介: 孙茹茹,2020年6月毕业于中国铁道科学研究院,获得工学硕士学位,主要从事新型土木工程材料和铁路混凝土结构耐久性领域的研究。李化建,博士,研究员,硕士研究生导师。主持国家自然科学基金4项、国家重点研发计划子课题1项、省部级科研课题12项。成果获国家科技进步二等奖1项,国家技术发明二等奖1项,中国专利优秀奖2项,省部级特等奖2项、一等奖6项、二等奖6项。授权国家发明专利26项,软件著作权3项。出版专著3部,发表SCI/EI论文22篇;编制行业标准16项。主要从事高速铁路混凝土结构耐久性、新型土木工程材料、高速铁路结构工程修复与防护等方面的应用基础研究。

引用本文:

孙茹茹, 王振, 黄法礼, 易忠来, 袁政成, 谢永江, 李化建. 不同岩性石粉-水泥复合胶凝材料性能研究[J]. 材料导报, 2021, 35(Z1): 211-215.
SUN Ruru, WANG Zhen, HUANG Fali, YI Zhonglai, YUAN Zhengcheng, XIE Yongjiang, LI Huajian. Study on Properties of Different Lithology Stone Powder-Cement Composite Cementitious Materials. Materials Reports, 2021, 35(Z1): 211-215.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2021/V35/IZ1/211

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