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纳米SiO2对掺膨胀剂碱矿渣砂浆力学及收缩性能的影响
Effect of Nano-SiO2 on Mechanical and Shrinkage Properties of Alkali-activated Slag Mortar with Expansion Agent
2021年第10期
碱激发矿渣;纳米SiO2;膨胀剂;抗压强度;收缩性能
Alkali-activated slag; Nano-SiO2; Expansion agent; Compressive strength; Shrinkage performance
2021年第10期
10.19761/j.1000-4637.2021.10.091.04
国家自然科学基金项目(52008003);安徽省重点研究与开发项目(201904a07020081)。
田 翔,陈佩圆,娄 星,李 进
安徽理工大学 土木建筑学院,安徽 淮南 232001

田 翔,陈佩圆,娄 星,李 进

田翔,陈佩圆,娄星,等.纳米SiO2对掺膨胀剂碱矿渣砂浆力学及收缩性能的影响[J].混凝土与水泥制品,2021(10):91-94.

TIAN X,CHEN P Y,LOU X,et al.Effect of Nano-SiO2 on Mechanical and Shrinkage Properties of Alkali-activated Slag Mortar with Expansion Agent[J].China Concrete and Cement Products,2021(10):91-94.

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摘   要:研究了纳米SiO2掺量对掺膨胀剂碱矿渣砂浆抗压强度、自收缩、干燥收缩和孔隙率的影响。结果表明:膨胀剂的掺入有助于减少碱激发矿渣砂浆的自收缩和干燥收缩,但会显著降低早期强度;掺入2%纳米SiO2可基本补偿由于掺入膨胀剂造成的强度损失,且对碱矿渣砂浆自收缩和干燥收缩的影响较小;适量纳米SiO2的掺入可显著降低掺膨胀剂碱矿渣砂浆的孔隙率。 Abstract: The effects of nano-SiO2 content on the compressive strength, self-shrinkage, dry shrinkage and porosity of the alkali-activated slag mortar(AASM) with expansion agent were analyzed. The results show that the addition of expansive agent can reduce the self-shrinkage and dry shrinkage of AASM, but can significantly reduce its early strength. The addition of 2% nano-SiO2 can basically compensate the strength loss caused by the addition of expansive agent, and has little effect on the self-shrinkage and dry shrinkage of AASM. Appropriate amount of nano-SiO2 can significantly reduce the porosity of AASM with expansion agent.  
英文名 : Effect of Nano-SiO2 on Mechanical and Shrinkage Properties of Alkali-activated Slag Mortar with Expansion Agent
刊期 : 2021年第10期
关键词 : 碱激发矿渣;纳米SiO2;膨胀剂;抗压强度;收缩性能
Key words : Alkali-activated slag; Nano-SiO2; Expansion agent; Compressive strength; Shrinkage performance
刊期 : 2021年第10期
DOI : 10.19761/j.1000-4637.2021.10.091.04
文章编号 :
基金项目 : 国家自然科学基金项目(52008003);安徽省重点研究与开发项目(201904a07020081)。
作者 : 田 翔,陈佩圆,娄 星,李 进
单位 : 安徽理工大学 土木建筑学院,安徽 淮南 232001

田 翔,陈佩圆,娄 星,李 进

田翔,陈佩圆,娄星,等.纳米SiO2对掺膨胀剂碱矿渣砂浆力学及收缩性能的影响[J].混凝土与水泥制品,2021(10):91-94.

TIAN X,CHEN P Y,LOU X,et al.Effect of Nano-SiO2 on Mechanical and Shrinkage Properties of Alkali-activated Slag Mortar with Expansion Agent[J].China Concrete and Cement Products,2021(10):91-94.

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引用本文

摘   要:研究了纳米SiO2掺量对掺膨胀剂碱矿渣砂浆抗压强度、自收缩、干燥收缩和孔隙率的影响。结果表明:膨胀剂的掺入有助于减少碱激发矿渣砂浆的自收缩和干燥收缩,但会显著降低早期强度;掺入2%纳米SiO2可基本补偿由于掺入膨胀剂造成的强度损失,且对碱矿渣砂浆自收缩和干燥收缩的影响较小;适量纳米SiO2的掺入可显著降低掺膨胀剂碱矿渣砂浆的孔隙率。

Abstract: The effects of nano-SiO2 content on the compressive strength, self-shrinkage, dry shrinkage and porosity of the alkali-activated slag mortar(AASM) with expansion agent were analyzed. The results show that the addition of expansive agent can reduce the self-shrinkage and dry shrinkage of AASM, but can significantly reduce its early strength. The addition of 2% nano-SiO2 can basically compensate the strength loss caused by the addition of expansive agent, and has little effect on the self-shrinkage and dry shrinkage of AASM. Appropriate amount of nano-SiO2 can significantly reduce the porosity of AASM with expansion agent.

 

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(1)纳米SiO2的掺入显著改善了由于掺膨胀剂而导致的碱矿渣砂浆力学性能的降低,且在一定范围内随着纳米SiO2掺量的增加,砂浆的抗压强度增加幅度变大。
      (2)纳米SiO2的掺入会增大掺膨胀剂碱矿渣砂浆的自收缩和干燥收缩,但是,与对照组相比,砂浆的自收缩和干燥收缩降低。相比较而言,对于掺有纳米SiO2的试验组,低掺量纳米SiO2在显著改善掺膨胀剂碱矿渣砂浆力学性能的同时,可有效控制其自收缩与干燥收缩。
      (3)纳米SiO2的掺入能显著降低掺膨胀剂碱矿渣砂浆的孔隙率,增大其真实密度与表观密度,使结构更加密实。

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田翔,陈佩圆,娄星,.纳米SiO2对掺膨胀剂碱矿渣砂浆力学及收缩性能的影响[J].混凝土与水泥制品,2021(10):91-94.

TIAN X,CHEN P Y,LOU X,et al.Effect of Nano-SiO2 on Mechanical and Shrinkage Properties of Alkali-activated Slag Mortar with Expansion Agent[J].China Concrete and Cement Products,2021(10):91-94.

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