Surface modification of quartz tailing and its effecton strength and drying shrinkage of cement mortars

Deng Chen; Min Deng; Chengwei Hao; Xianghui Lan; Liwu Mo

doi:10.3969/j.issn.1001-9731.2016.10.011

Surface modification of quartz tailing and its effecton strength and drying shrinkage of cement mortars

Deng Chen, Min Deng, Chengwei Hao, Xianghui Lan, Liwu Mo

College of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The surface of quartz tailing was modified by calcination method through mixing with carbide slag. The mineral composition and microstructure of the modified quartz tailing were analyzed by using X-ray diffraction (XRD), backscattered electron microscopy (BSEM) and energy dispersive spectrometer (EDS). The effects of modified quartz tailing on the drying shrinkage and compressive strength of cement mortars were investigated. The microstructure of cement mortars was analyzed by using BSEM and mercury intrusion porosimetry (MIP). The results show that the β-C₂S phases were formed on the surface of the modified quartz tailings. Due to the hydration of the β-C₂S, CSH gel was generated, the interface between cement paste and quartz tailing was densified, the porosity and drying shrinkage of cement mortars with the modified quartz tailing was decreased, and the compressive strength of cement mortars was increased.

Original language	English
Pages (from-to)	10065-10069
Number of pages	5
Journal	Gongneng Cailiao/Journal of Functional Materials
Volume	47
Issue number	10
DOIs	https://doi.org/10.3969/j.issn.1001-9731.2016.10.011
State	Published - 30 Oct 2016

Keywords

Drying shrinkage
Interface
Quartz tailing
Strength
Surface modification

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10.3969/j.issn.1001-9731.2016.10.011

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title = "Surface modification of quartz tailing and its effecton strength and drying shrinkage of cement mortars",

abstract = "The surface of quartz tailing was modified by calcination method through mixing with carbide slag. The mineral composition and microstructure of the modified quartz tailing were analyzed by using X-ray diffraction (XRD), backscattered electron microscopy (BSEM) and energy dispersive spectrometer (EDS). The effects of modified quartz tailing on the drying shrinkage and compressive strength of cement mortars were investigated. The microstructure of cement mortars was analyzed by using BSEM and mercury intrusion porosimetry (MIP). The results show that the β-C2S phases were formed on the surface of the modified quartz tailings. Due to the hydration of the β-C2S, CSH gel was generated, the interface between cement paste and quartz tailing was densified, the porosity and drying shrinkage of cement mortars with the modified quartz tailing was decreased, and the compressive strength of cement mortars was increased.",

keywords = "Drying shrinkage, Interface, Quartz tailing, Strength, Surface modification",

author = "Deng Chen and Min Deng and Chengwei Hao and Xianghui Lan and Liwu Mo",

year = "2016",

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doi = "10.3969/j.issn.1001-9731.2016.10.011",

language = "英语",

volume = "47",

pages = "10065--10069",

journal = "Gongneng Cailiao/Journal of Functional Materials",

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TY - JOUR

T1 - Surface modification of quartz tailing and its effecton strength and drying shrinkage of cement mortars

AU - Chen, Deng

AU - Deng, Min

AU - Hao, Chengwei

AU - Lan, Xianghui

AU - Mo, Liwu

PY - 2016/10/30

Y1 - 2016/10/30

N2 - The surface of quartz tailing was modified by calcination method through mixing with carbide slag. The mineral composition and microstructure of the modified quartz tailing were analyzed by using X-ray diffraction (XRD), backscattered electron microscopy (BSEM) and energy dispersive spectrometer (EDS). The effects of modified quartz tailing on the drying shrinkage and compressive strength of cement mortars were investigated. The microstructure of cement mortars was analyzed by using BSEM and mercury intrusion porosimetry (MIP). The results show that the β-C2S phases were formed on the surface of the modified quartz tailings. Due to the hydration of the β-C2S, CSH gel was generated, the interface between cement paste and quartz tailing was densified, the porosity and drying shrinkage of cement mortars with the modified quartz tailing was decreased, and the compressive strength of cement mortars was increased.

AB - The surface of quartz tailing was modified by calcination method through mixing with carbide slag. The mineral composition and microstructure of the modified quartz tailing were analyzed by using X-ray diffraction (XRD), backscattered electron microscopy (BSEM) and energy dispersive spectrometer (EDS). The effects of modified quartz tailing on the drying shrinkage and compressive strength of cement mortars were investigated. The microstructure of cement mortars was analyzed by using BSEM and mercury intrusion porosimetry (MIP). The results show that the β-C2S phases were formed on the surface of the modified quartz tailings. Due to the hydration of the β-C2S, CSH gel was generated, the interface between cement paste and quartz tailing was densified, the porosity and drying shrinkage of cement mortars with the modified quartz tailing was decreased, and the compressive strength of cement mortars was increased.

KW - Drying shrinkage

KW - Interface

KW - Quartz tailing

KW - Strength

KW - Surface modification

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U2 - 10.3969/j.issn.1001-9731.2016.10.011

DO - 10.3969/j.issn.1001-9731.2016.10.011

M3 - 文章

AN - SCOPUS:85012271903

SN - 1001-9731

VL - 47

SP - 10065

EP - 10069

JO - Gongneng Cailiao/Journal of Functional Materials

JF - Gongneng Cailiao/Journal of Functional Materials

IS - 10

ER -

Surface modification of quartz tailing and its effecton strength and drying shrinkage of cement mortars

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Keywords

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