Effects of Mixed Metakaolin and Silica Fume on Mechanical Properties of EPS Concrete

CHEN Xiao; WANG Xiu-li; HOU Hong-jie; MA Yun-long; PAN Xu-bin; HU En-jin

doi:10.13204/j.gyjzG22041823

Volume 52 Issue 9

Sep. 2022

Turn off MathJax

Article Contents

Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(9): 229-233

CHEN Xiao, WANG Xiu-li, HOU Hong-jie, MA Yun-long, PAN Xu-bin, HU En-jin. Effects of Mixed Metakaolin and Silica Fume on Mechanical Properties of EPS Concrete[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 229-233. doi: 10.13204/j.gyjzG22041823

Citation:

CHEN Xiao, WANG Xiu-li, HOU Hong-jie, MA Yun-long, PAN Xu-bin, HU En-jin. Effects of Mixed Metakaolin and Silica Fume on Mechanical Properties of EPS Concrete[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 229-233. doi: 10.13204/j.gyjzG22041823

Citation:

PDF( 4520 KB)

Effects of Mixed Metakaolin and Silica Fume on Mechanical Properties of EPS Concrete

doi: 10.13204/j.gyjzG22041823

1. Gansu Construction Investment Civil Engineering Construction Group Co., Ltd., Lanzhou 730070, China;
2. Lanzhou University of Technology, School of Civil Engineering, Lanzhou 730050, China;
3. Western Center of Disaster Mitigation of Ministry of Education, Lanzhou 730050, China

Received Date: 2022-04-18
Available Online: 2023-02-06

Abstract

Abstract

In order to study the effect of different dosages of metakaolin and silica fume on the physical and mechanical properties of EPS concrete, metakaolin and silica fume with different contents were used as auxiliary cementing materials, and the contents of 0%, 5%, 10% and 15% were used to replace part of the cement, respectively, and 16 groups of EPS concrete specimens with different proportions were prepared. The water absorption, compressive strength, flexural strength and splitting tensile strength were measured. The results showed that the addition of a certain amount of silica fume and metakaolin could reduce the water absorption of EPS concrete and improve its compressive strength, bending and splitting tensile strength, but when the dosage was too high, the water absorption would increase and the strength would decrease, and when the content of both was 10%, EPS concrete had the lowest water absorption and the best mechanical properties. Although the particle size of metakaolin was larger than that of silica fume, its "pozzolanic effect" was stronger, so the improvement of the mechanical properties of EPS concrete was better than that of silica fume. Metakaolin and silica fume could improve the adhesion of EPS particles to the gel matrix.
- EPS concrete,
- metakaolin,
- silica fume,
- physical and mechanical properties,
- bond

FullText(HTML)

References(16)

References

[1]	张文华, 吕毓静, 刘鹏宇.EPS混凝土研究进展综述[J].材料导报, 2019, 33(13):2214-2228.
[2]	姜德民, 杜明军, 潘大林, 等.提高EPS轻骨料混凝土强度的研究[J].建筑技术, 2009, 40(1):27-29.
[3]	BABU D S, BABU K G, WEE T H.Effect of polystyrene aggregate size on strength and moisture migration characteristics of lightweight concrete[J].Cement and Concrete Composites, 2006, 28(6):520-527.
[4]	LING I H, TEO D C L.Properties of EPS RHA lightweight concrete bricks under different curing conditions[J].Construction and Building Materials, 2011, 25(5):3648-3655.
[5]	TANYILDIZI H, COSKUN A.Performance of lightweight concrete with silica fume after high temperature[J].Construction and Building Materials, 2008, 22(10):2124-2129.
[6]	孔德顺, 李志, 李琳, 等.煤系高岭土合成NaP分子筛的XRD分析及表征[J].人工晶体学报, 2013, 42(4):772-777.
[7]	余强, 曾俊杰, 范志宏, 等.偏高岭土和硅灰对混凝土性能影响的对比分析[J].硅酸盐通报, 2014, 33(12):3134-3139.
[8]	李晓琴, 周旭, 李世华, 等.硅灰改性高韧性水泥基材料性能试验研究[J].土木与环境工程学报, 2021.DOI: 10.11835/j.issn.2096 -6717.2021.012.
[9]	丁向群, 刘丹阳, 徐晓婉.石膏、硅灰对硅酸盐胶凝材料早期抗压强度的影响[J].硅酸盐通报, 2017, 36(1):33-37.
[10]	莫宗云, 白力改, 王大光, 等.偏高岭土对超高性能混凝土性能的影响研究[J].非金属矿, 2018, 41(6):30-32.
[11]	CHEN B, LIU J, CHEN L Z.Experimental study of lightweight expanded polystyrene aggregate concrete containing silica fume and polypropylene fibers[J].Journal of Shanghai Jiaotong University (Science), 2010, 15(2):129-137.
[12]	FATHI M, YOUSEFIPOUR A, FAROKHY E H.Mechanical and physical properties of expanded polystyrene structural concretes containing micro-silica and nano-silica[J].Construction and Building Materials, 2017, 136:590-597.
[13]	韩佃利, 徐国强, 张静.硅灰掺量对水泥基灌浆料早期性能的影响研究[J].混凝土, 2014(8):71-73.
[14]	叶东忠.早强剂对掺硅灰的水泥砂浆强度与结构影响的研究[J].北京工商大学学报(自然科学版), 2009, 27(2):8-10.
[15]	THOMAS M D A, MATTHEWS J D.The permeability of fly ash concrete[J].Materials and Structures, 1992, 25(7):388-396.
[16]	GÜNEYISI E, GESOǦLU M, KARAOǦLU S, et al. Strength, permeability and shrinkage cracking of silica fume and metakaolin concretes[J]. Construction and Building Materials, 2012, 34:120-130.