EFFECT OF FREEZING LAWS FOR CONCRETE PORES ON COMPRESSIVE STRENGTH IN PERMAFROST REGIONS

WANG Xiaoxiao; LIU Chang; ZHANG Ju; LIU Shuguang; YAN Zhangwang; LI Heng

doi:10.13204/j.gyjzG20072117

Volume 51 Issue 9

Jan. 2022

Turn off MathJax

Article Contents

Article Navigation > INDUSTRIAL CONSTRUCTION > 2021 > 51(9): 197-201

WANG Xiaoxiao, LIU Chang, ZHANG Ju, LIU Shuguang, YAN Zhangwang, LI Heng. EFFECT OF FREEZING LAWS FOR CONCRETE PORES ON COMPRESSIVE STRENGTH IN PERMAFROST REGIONS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 197-201. doi: 10.13204/j.gyjzG20072117

Citation:

WANG Xiaoxiao, LIU Chang, ZHANG Ju, LIU Shuguang, YAN Zhangwang, LI Heng. EFFECT OF FREEZING LAWS FOR CONCRETE PORES ON COMPRESSIVE STRENGTH IN PERMAFROST REGIONS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(9): 197-201. doi: 10.13204/j.gyjzG20072117

Citation:

PDF( 1915 KB)

EFFECT OF FREEZING LAWS FOR CONCRETE PORES ON COMPRESSIVE STRENGTH IN PERMAFROST REGIONS

doi: 10.13204/j.gyjzG20072117

WANG Xiaoxiao^1,2,4,
LIU Chang¹,
ZHANG Ju^{3,4
,
,},
LIU Shuguang^3,4,
YAN Zhangwang^3,4,
LI Heng¹

1. School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia University of Technology, Hohhot 010051, China;
3. School of Mining and Technology, Inner Mongolia University of Technology, Hohhot 010051, China;
4. Inner Mongolia Engineering Research Center of Ecological Building Materials and Prefabricated Construction, Hohhot 010051, China

Received Date: 2020-07-21
Available Online: 2022-01-11

Abstract

Abstract

In order to study the effect of freezing laws for concrete pores on compressive strength in permafrost regions, a self-made low-temperature compressive testing machine was used to gauge the concrete compressive strength. The laws of ice content in different size pores were measured by nuclear magnetic resonance apparatuses. Based on the grey theory, the effect of the ice content in pores on compressive strength was analyzed, and the relation model between ice content and compressive strength was constructed. The results showed that from 0℃ to -10℃, the capillary pores and transition pores freezed rapidly due to the larger pore sizes, so the ice content and compressive strength increased rapidly in the temperature range. Transition pores were the main pores of concrete. At -10℃, 99.7% of the capillary pores and 55.8% of the transition pores had been frozen. At the time, the proportion of gel pore increased and it was hard to be frozen, so the ice content and compressive strength increased slowly. The ice content of the transition pores was the most significant influence on compressive strength, and its correlation degree of grey entropy was 0.985 0. The calculated values of concrete compressive strength based on GM(0,2) Model had an average relative error of 3.33% from the test value.
- permafrost region,
- concrete,
- freezing law,
- compressive strength

FullText(HTML)

References(21)

References

[1]	甄春相.青藏线多年冻土遥感调查工程地质分区[J].铁道勘察,2004(4):1-4.
[2]	王海新,吴亚平,孙安元,等. 循环荷载下冻土桩基力学特性研究[J]. 铁道科学与工程学报, 2017, 14(10):85-91.
[3]	LIU J, LV P, CUI Y, et al. Experimental Study on Direct Shear Behavior of Frozen Soil-Concrete Interface[J]. Cold Regions Science & Technology, 2014, 104(3):1-6.
[4]	WU X, PRAKASH V. Dynamic Compressive Behavior of Ice at Cryogenic Temperatures[J]. Cold Regions Science & Technology, 2015, 118:1-13.
[5]	CHATTERJI S. Freezing of Aqueous Solutions in a Porous Medium:Part 1[J]. Cement and Concrete Research,1985(15):13-20.
[6]	NEITHALATH N, SUMANASOORIYA M S, DEO O. Characterizing Pore Volume, Sizes, and Connectivity in Pervious Concretes for Permeability Prediction[J]. Materials Characterization, 2010, 61(8):802-813.
[7]	DAHMANI L, KHENANE A, KACI S. Behavior of the Reinforced Concrete at Cryogenic Temperatures[J]. Cryogenics, 2007, 47(9/10):517-525.
[8]	JIANG Z W, DENG Z L, ZHU X P, et al. Increased Strength and Related Mechanisms for Mortars at Cryogenic Temperatures[J]. Cryogenics, 2018, 94:5-13.
[9]	BROWNE R D, BAMFORTH P B. The Use of Concrete for Cryogenic Storage:A Summary of Research, Past, and Present[C]//Proc., 1st Int. Conf. on Cryogenic Concrete, 1981:135-166.
[10]	MONTEJO L A, SLOAN J E, KOWALSKY M J, et al. Cyclic Response of Reinforced Concrete Members at Low Temperatures[J]. Journal of Cold Regions Engineering, 2008, 22(3):79-102.
[11]	中华人民共和国住房和城乡建设部. 普通混凝土配合比设计规程:JGJ 55-2011[S].北京:中国建筑工业出版社, 2011.
[12]	中华人民共和国建设部.普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2002.
[13]	王萧萧,刘曙光,闫长旺,等. 一种调控低温环境试验装置及试验方法:CN109470578A[P]. 2019-03-15.
[14]	WANG X X, LIU C, LIU S G, et al. Compressive Strength of Pile Foundation Concrete in Permafrost Environment in China[J]. Construction and Building Materials, 2020, 247:118431.https:doi.org/10.1016/j.conbuildmat.2020.118431.
[15]	YANG R W, LEMARCHAND E, FEN-CHONG T, et al. A Micromechanics Model for Partial Freezing in Porous Media[J]. International Journal of Solids and Structures, 2015, 75:109-121.
[16]	WANG Y R, CAO Y B, ZHANG P, et al. Water Absorption and Chloride Diffusivity of Concrete Under the Coupling Effect of Uniaxial Compressive Load and Freeze-Thaw Cycles[J]. Construction and Building Materials, 2019, 209:566-576.
[17]	KUMAR R, BHATTACHARJEE B. Porosity, Pore Size Distribution and in Situ Strength of Concrete[J]. Cement & Concrete Research, 2003, 33(1):155-164.
[18]	SUN Z, SCHERER G W. Pore Size and Shape in Mortar by Thermoporometry[J]. Cement & Concrete Research, 2010, 40(5):740-751.
[19]	邓寿昌,李克俭. 超负温混凝土的性质研究[J]. 低温建筑技术, 2002(3):5-7.
[20]	王萧萧,申向东,王海龙,等.天然浮石混凝土孔溶液结冰规律的研究[J].材料导报,2017,31(6):130-135.
[21]	刘思峰,杨英杰,吴利丰. 灰色系统理论及其应用[M]. 北京:科学出版社, 2014.