激振搅拌对水泥稳定碎石与煤矸石抗压强度的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (2): 757-765.

所属专题：道路材料

激振搅拌对水泥稳定碎石与煤矸石抗压强度的影响

王稷良^1,2, 郭文彬^1,2, 宋庆凯³, 徐伟东⁴, 刘鹏⁵

1.河北工程大学土木工程学院,邯郸 056038;
2.交通运输部公路科学研究院,北京 100088;
3.内蒙古路桥集团有限责任公司,呼和浩特 010010;
4.内蒙古雷石环保科技有限公司,乌海 016040;
5.内蒙古综合交通科学研究院有限责任公司,呼和浩特 010010

收稿日期:2023-07-28 修订日期:2023-11-18 出版日期:2024-02-15 发布日期:2024-02-05
通信作者: 郭文彬,硕士研究生。E-mail:954809281@qq.com
作者简介:王稷良(1978—),男,博士,研究员。主要从事高性能水泥基材料方面的研究。E-mail:jiliangwang@163.com
基金资助:
内蒙古自治区交通运输科技项目(NJ-2020-28,NJ-2022-13)

Effect of Excitation Stirring on Compressive Strength of Cement Stabilized Crushed Stone and Coal Gangue

WANG Jiliang^1,2, GUO Wenbin^1,2, SONG Qingkai³, XU Weidong⁴, LIU Peng⁵

1. School of Civil Engineering, Hebei University of Engineering, Handan 056038, China;
2. Research Institute of Highway, Ministry of Transport, Beijing 100088, China;
3. Inner Mongolia Luqiao Group Co., Ltd., Hohhot 010010, China;
4. Inner Mongolia Leishi Environmental Protection Technology Co., Ltd., Wuhai 016040, China;
5. Inner Mongolia Comprehensive Transportation Research Institute Co., Ltd., Hohhot 010010, China

Received:2023-07-28 Revised:2023-11-18 Online:2024-02-15 Published:2024-02-05

摘要/Abstract

摘要： 为研究激振搅拌工艺对水泥稳定煤矸石混合料性能的影响规律,以水泥稳定碎石为基准,对比分析普通搅拌与激振搅拌对不同水泥剂量的水泥稳定基层材料无侧限抗压强度的影响。结果表明:在干拌状态下增加激振工艺对基层混合料抗压强度的提升效果显著,在激振气压为0.4 MPa、激振干拌30 s后普通湿拌30 s条件下,混合料的7 d无侧限抗压强度达到最佳;激振搅拌对水泥稳定碎石、水泥稳定煤矸石混合料强度的平均提升幅度约为20%,对煤矸石混合料的强度提升更加显著,水泥剂量越少,提升幅度越大。SEM结果表明激振搅拌后混合料中的水化产物分布更加均匀,结构更加致密;经线性拟合计算,当水泥剂量为2.0%～7.0%(质量分数,下同)时,激振搅拌对于碎石混合料可节约8.9%～26.3%的水泥,对于煤矸石混合料可节约12.9%～30.8%水泥,且节约率与水泥剂量成反比。

关键词: 基层材料, 激振搅拌, 水泥稳定碎石, 煤矸石, 无侧限抗压强度

Abstract: In order to study the influence of excitation stirring process on the performance of cement stabilized coal gangue mixture, based on cement stabilized crushed stone, the effects of conventional stirring and excitation stirring on the unconfined compressive strength of cement stabilized base materials with different cement dosages were compared and analyzed. The results show that increasing the excitation stirring in the dry mixing state has a significant effect on the compressive strength of the base mixture. The 7 d unconfined compressive strength of the mixture reaches the best under the conditions of 0.4 MPa air pressure, 30 s of vibration dry mixing and 30 s of ordinary wet mixing. The average increase of the strength of cement stabilized crushed stone and cement stabilized coal gangue mixture is about 20%, the strength improvement of coal gangue mixture is more significant, and the less the cement dosage, the greater the increase. The SEM results show that the distribution of hydration products in the mixture is more uniform and the structure is more compact after the excitation stirring. According to the linear fitting calculation, when the cement dosage is 2.0%～7.0% (mass fraction, the same bellow), the vibration mixing can save 8.9%～26.3% cement for the gravel mixture and 12.9%～30.8% cement for the coal gangue mixture. And the saving rate is inversely proportional to the cement dosage.

Key words: base material, excitation stirring, cement stabilized crushed stone, coal gangue, unconfined compressive strength

中图分类号:

U416.1

王稷良, 郭文彬, 宋庆凯, 徐伟东, 刘鹏. 激振搅拌对水泥稳定碎石与煤矸石抗压强度的影响[J]. 硅酸盐通报, 2024, 43(2): 757-765.

WANG Jiliang, GUO Wenbin, SONG Qingkai, XU Weidong, LIU Peng. Effect of Excitation Stirring on Compressive Strength of Cement Stabilized Crushed Stone and Coal Gangue[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(2): 757-765.

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激振搅拌对水泥稳定碎石与煤矸石抗压强度的影响

Effect of Excitation Stirring on Compressive Strength of Cement Stabilized Crushed Stone and Coal Gangue

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