煤矸石活性激发及其胶砂力学性能试验研究_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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煤矸石活性激发及其胶砂力学性能试验研究

Mix Proportion Design of Machine-made Sand Self-compacting Lightweight Aggregate Concrete Based on Orthogonal Test

2021年第12期

煤矸石；活性；机械球磨；化学激发剂；微观分析；胶砂；抗压强度

Coal gangue; Activity; Mechanical ball milling; Chemical activator; Microscopic analysis; Mortar; Compressive strength

2021年第12期

10.19761/j.1000-4637.2021.12.079.05

国家自然科学基金青年项目（51808443）；陕西省自然科学基础研究计划青年项目（2019JQ-131）；西部绿色建筑国家重点实验室开放基金项目（LSKF201808）。

丁莎1,2，陈霁溪3，关虓2,3

1.西安建筑科技大学土木工程学院，陕西西安 710055；2.西安建筑科技大学省部共建西部绿色建筑国家重点实验室，陕西西安 710055；3.西安科技大学建筑与土木工程学院，陕西西安 710054

丁莎1,2，陈霁溪3，关虓2,3

丁莎,陈霁溪,关虓.煤矸石活性激发及其胶砂力学性能试验研究[J].混凝土与水泥制品,2021(12):79-83.

DING S,CHEN J X,GUAN X.Experimental Study on Active Excitation of Coal Gangue and Mechanical Properties of Mortar[J].China Concrete and Cement Products,2021(12):79-83.

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1000

摘要：以煤矸石为原料，利用机械球磨法粉碎煤矸石，并将其与不同的化学激发剂混合，制得了活性不一的煤矸石粉。通过正交试验，研究了煤矸石粉掺量、化学激发剂种类和掺量对煤矸石胶砂抗压强度的影响，利用X射线衍射（XRD）和扫描电镜（SEM）分析了煤矸石粉的矿物组成和微观形貌。结果表明：机械球磨破坏了煤矸石的层状结构，提高了其表面活性；以10%掺量的煤矸石粉等质量替代水泥，并掺入2%的Ca(OH)2激发剂，可加快煤矸石粉的二次水化，对应胶砂试件的抗压强度达到最大。 Abstract: Coal gangue powder with different activity was prepared by mechanical ball milling and mixing with different chemical activators. Through orthogonal test, the influence of coal gangue powder content, chemical activator type and content on the compressive strength of coal gangue mortar was studied, and the mineral composition and micro morphology of coal gangue powder were analyzed by X-ray diffraction(XRD) and scanning electron microscope(SEM). The results show that mechanical ball milling destroys the layered structure of coal gangue and improves its surface activity. By replacing cement with 10% coal gangue powder and adding 2% Ca(OH)2 activator, the secondary hydration of coal gangue powder can be accelerated, and the compressive strength of corresponding mortar specimen can reach the maximum.

英文名 : Mix Proportion Design of Machine-made Sand Self-compacting Lightweight Aggregate Concrete Based on Orthogonal Test

刊期 : 2021年第12期

关键词 : 煤矸石；活性；机械球磨；化学激发剂；微观分析；胶砂；抗压强度

Key words : Coal gangue; Activity; Mechanical ball milling; Chemical activator; Microscopic analysis; Mortar; Compressive strength

刊期 : 2021年第12期

DOI : 10.19761/j.1000-4637.2021.12.079.05

文章编号 :

基金项目 : 国家自然科学基金青年项目（51808443）；陕西省自然科学基础研究计划青年项目（2019JQ-131）；西部绿色建筑国家重点实验室开放基金项目（LSKF201808）。

作者 : 丁莎1,2，陈霁溪3，关虓2,3

单位 : 1.西安建筑科技大学土木工程学院，陕西西安 710055；2.西安建筑科技大学省部共建西部绿色建筑国家重点实验室，陕西西安 710055；3.西安科技大学建筑与土木工程学院，陕西西安 710054

丁莎1,2，陈霁溪3，关虓2,3

丁莎,陈霁溪,关虓.煤矸石活性激发及其胶砂力学性能试验研究[J].混凝土与水泥制品,2021(12):79-83.

DING S,CHEN J X,GUAN X.Experimental Study on Active Excitation of Coal Gangue and Mechanical Properties of Mortar[J].China Concrete and Cement Products,2021(12):79-83.

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引用本文

Abstract: Coal gangue powder with different activity was prepared by mechanical ball milling and mixing with different chemical activators. Through orthogonal test, the influence of coal gangue powder content, chemical activator type and content on the compressive strength of coal gangue mortar was studied, and the mineral composition and micro morphology of coal gangue powder were analyzed by X-ray diffraction(XRD) and scanning electron microscope(SEM). The results show that mechanical ball milling destroys the layered structure of coal gangue and improves its surface activity. By replacing cement with 10% coal gangue powder and adding 2% Ca(OH)₂ activator, the secondary hydration of coal gangue powder can be accelerated, and the compressive strength of corresponding mortar specimen can reach the maximum.

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