稻壳灰与偏高岭土掺料对再生混凝土性能的影响

曹芙波; 魏子洋; 王晨霞; 刘丽洁; 倪磊; 田金亮

doi:10.13204/j.gyjzG20031602

稻壳灰与偏高岭土掺料对再生混凝土性能的影响

doi: 10.13204/j.gyjzG20031602

1. 内蒙古科技大学土木工程学院, 内蒙古包头 014010;
2. 包头市建设工程质量检测试验中心, 内蒙古包头 014030;
3. 包头城建集团股份有限公司, 内蒙古包头 014020

基金项目:

国家自然科学基金项目（51868061）；内蒙古自然科学基金项目（2020MS05071）。

详细信息

作者简介:
曹芙波,男,1976年出生,博士,教授。

通讯作者:
王晨霞,wangchenxia77@139.com。

计量
- 文章访问数: 99
- HTML全文浏览量: 10
- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2020-03-16
- 网络出版日期: 2021-08-19

EFFECTS OF RICE HUSK ASH AND METAKAOLIN ADMIXTURE ON THE PROPERTIES OF RECYCLED CONCRETE

1. School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. Baotou Construction Engineering Quality Test Center, Baotou 014030, China;
3. Baotou Urban Construction Group Co., Ltd., Baotou 014020, China

摘要

摘要: 稻壳灰与偏高岭土均是具有火山灰活性的材料。采用稻壳灰和偏高岭土配置复合强化液对再生粗骨料进行化学强化，研究强化液对再生粗骨料性能的改善效果以及强化后再生粗骨料制备的再生混凝土的性能。研究表明：5种不同配比的强化液均可以优化再生粗骨料和再生混凝土的性能；当强化液中稻壳灰与偏高岭土掺量比为3：1时，再生粗骨料的压碎指标较强化前降低了1.5%，空隙率降低了2.4%，表观密度与堆积密度均有所改善，吸水率增加了2.2%；与基准组相比，用强化骨料制备的再生混凝土抗压强度增长了8.6%，抗折强度增长了4.4%，且具有更好的耐磨性。
- 复合掺料 /
- 掺量比选 /
- 活性材料 /
- 化学强化 /
- 再生粗骨料
Abstract: Both rice husk ash and metakaolin are pozzolanic active materials. In the experiment,chemical slurry of rice husk ash and metakaolin were used to strengthen the recycled coarse aggregate. The effects of chemical slurry on the properties of recycled coarse aggregate and the properties of recycled concrete prepared were tested. Studies showed that the properties of recycled coarse aggregate and recycled concrete could be optimized by 5 different ratios of chemical slurry. When the mixing ratio of rice husk ash and metakaolin was 3:1, the crushing index of recycled coarse aggregate decreased by 1.5%, the void ratio decreased by 2.4%,the apparent density and bulk density improved,the water absorption increased by 2.2%.Compared with the reference group, the compressive strength of recycled concrete prepared with reinforced aggregate increased by 8.6%, the flexural strength increased by 4.4% and the wear resistance was better.
- composite admixture /
- percentage selection /
- active material /
- chemical strengthning /
- recycled coarse aggregate

HTML全文

参考文献(15)

[1]	梁强强,郑挥欣. 再生粗骨料特性及其对混凝土性能的影响研究[J]. 商品混凝土,2019(9):40-43.
[2]	肖建庄,林壮斌,朱军.再生骨料级配对混凝土抗压强度的影响[J].四川大学学报(工程科学版),2014(4):154-160.
[3]	SHAIKH F U A.Mechanical Properties of Concrete Containing Recycled Coarse Aggregate at and After Exposure to Elevated Temperatures[J].Structural Concrete, 2018,19(2):400-410.
[4]	单玉川,沈翀,孔德玉,等.再生骨料原位强化对再生混凝土及其结构性能的影响[J].建筑结构,2016(12):37-40.
[5]	QIU J,TNG D Q S,YANG E.Surface Treatment of Recycled Concrete Aggregates Through Microbial Carbonate Precipitation[J].Construction and Building Materials,2014,57:144-150.
[6]	应敬伟,蒙秋江,肖建庄.再生骨料CO₂强化及其对混凝土抗压强度的影响[J].建筑材料学报,2017(2):277-282.
[7]	汪先三.我国高岭土开发利用现状及应用前景[J].中国非金属矿工业导刊,2016(2):8-9,19.
[8]	BADOGIANNIS E,KAKALI G,DIMOPOULOU G,et al. Metakaolin as a Main Cement Constituent. Exploitation of Poor Greek Kaolins[J]. Cement and Concrete Composites,2004,27(2):197-203.
[9]	ERHAN G,MEHMET G,KASIM M. Improving Strength,Drying Shrinkage,and Pore Structure of Concrete Using Metakaolin[J]. Materials and Structures,2008,41(5):937-949.
[10]	JIANG G,RONG Z D,SUN W. Effects of Metakaolin on Mechanical Properties,Pore Structure and Hydration Heat of Mortars at 0.17w/b Ratio[J]. Construction and Building Materials,2015,93:564-572.
[11]	曾俊杰,王胜年,范志宏,等.偏高岭土改善海工混凝土抗氯离子侵蚀性的效果及机理[J].武汉理工大学学报,2015,37(4):22-28.
[12]	余景良. 稻壳灰不同掺量对混凝土性能影响测试与比较研究[J].硅酸盐通报,2016,35(4):1287-1291 ,1326.
[13]	HA T L,LUDWIG H M. Effect of Rice Husk Ash and Other Mineral Admixtures on Properties of Self-Compacting High Performance Concrete[J]. Materials & Design,2016,89:156-166.
[14]	马嘉琛,黄鑫,仵江涛,等. 稻壳灰粒径对水泥砂浆性能的影响[J].硅酸盐通报,2019,38(12):3878-3883 ,3904.
[15]	王维红,孟云芳,王德志,等. 稻壳灰和其他矿物掺合料对混凝土力学性能及微观结构的影响[J].混凝土,2017(8):66-69.