Effect of Steam Curing System on Strength and Impermeability of Precast Bridge Deck Concrete

Abstract

Abstract: In order to obtain the best steam curing system for precast bridge deck concrete, the effects of steam curing temperature, steam curing time and supplementary curing method after steam curing on strength and chloride ion diffusion coefficient of C55 concrete incorporated with fly ash and slag powder were studied. The phase composition and microstructure of the cementitious paste hydrated under different steam curing systems were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the higher steam curing temperature and the longer steam curing time promote the hydration of cement and the formation of the paste microstructure, which increase the demoulding strength of concrete, but reduce the later strength and the resistance to chloride ion penetration of concrete. The supplementary moisture curing after steam curing provided hydration water for the continuous hydration of unhydrated cement and mineral admixtures, which helps to improve the later strength and impermeability of concrete. The precast bridge deck concrete has good comprehensive performance when it is steam cured for 6 h at 55 ℃ and then wet cured for 7 d with covering of geotextile.

Key words: concrete, steam curing system, compressive strength, impermeability, microstructure

CLC Number:

TU528.79

HUANG An, LI Beixing, YANG Jianbo, WANG Lijing. Effect of Steam Curing System on Strength and Impermeability of Precast Bridge Deck Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1170-1177.

References

[1] 赵梦柯.矿物掺合料对蒸养混凝土力学性能的影响[J].粉煤灰综合利用,2014,27(3):27-30.
ZHAO M K. Effect of mineral admixtures on the mechanical property of steam curing concrete[J]. Fly Ash Comprehensive Utilization, 2014, 27(3): 27-30 (in Chinese).
[2] 李家和,索松山.蒸养制度对干硬性混凝土抗压强度的影响[J].低温建筑技术,2013,35(4):1-3.
LI J H, SUO S S. Influence of steam-curing system on the compressive strength of dry concrete[J]. Low Temperature Architecture Technology, 2013, 35(4): 1-3 (in Chinese).
[3] 刘慧,沈一昌,邓泽,等.矿物复掺及蒸养方式对管片钢渣混凝土力学性能的影响[J].混凝土与水泥制品,2018(6):35-38.
LIU H, SHEN Y C, DENG Z, et al. The influence of mineral admixture and steam curing on mechanical properties of shield steel slag concrete[J]. China Concrete and Cement Products, 2018(6): 35-38 (in Chinese).
[4] 耿春东,商得辰,余松柏,等.养护制度对高掺花岗岩石粉UHPC性能的影响[J].硅酸盐通报,2020,39(1):83-89.
GENG C D, SHANG D C, YU S B, et al. Effect of curing regime on performance of ultra high performance concrete with high-doped granite powder[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(1): 83-89 (in Chinese).
[5] 刘鹏.蒸养混凝土抗硫酸盐-氯盐复合侵蚀性能研究[D].哈尔滨:哈尔滨工业大学,2018.
LIU P. Study on anti-sulfate-chloride composite erosion performance of steam cured concrete[D]. Harbin: Harbin Institute of Technology, 2018 (in Chinese).
[6] 耿健,彭波,孙家瑛.蒸汽养护制度对水泥石孔结构的影响[J].建筑材料学报,2011,14(1):116-118+123.
GENG J, PENG B, SUN J Y. Effect of steam curing system on pore structure of cement paste[J]. Journal of Building Materials, 2011, 14(1): 116-118+123 (in Chinese).
[7] HE Z M, LIU J Z, ZHU K W. Influence of mineral admixtures on the short and long-term performance of steam-cured concrete[J]. Energy Procedia, 2012, 16: 836-841.
[8] 毛荣一,耿健,李鹏鹏,等.蒸养静停时间对标养水泥石氯离子固化性能的影响[J].硅酸盐通报,2017,36(7):2215-2219+2225.
MAO R Y, GENG J, LI P P, et al. Influence of delay period of steam curing on chloride ions binding capacity of harden cement paste with subsequent standard curing[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(7): 2215-2219+2225 (in Chinese).
[9] 贺智敏,龙广成,谢友均,等.蒸养混凝土的表层伤损效应[J].建筑材料学报,2014,17(6):994-1000+1008.
HE Z M, LONG G C, XIE Y J, et al. Surface layer degradation effect of steam-cured concrete[J]. Journal of Building Materials, 2014, 17(6): 994-1000+1008 (in Chinese).
[10] 索松山.蒸养制度对干硬性混凝土性能的影响[D].哈尔滨:哈尔滨工业大学,2012.
SUO S S. Influence of steam-curing system on the performance of dry concrete[D]. Harbin: Harbin Institute of Technology, 2012 (in Chinese).
[11] 贺智敏.蒸养混凝土的热损伤效应及其改善措施研究[D].长沙:中南大学,2012.
HE Z M. Heat damage effects of steam curing on concrete and corresponding improvement measures[D]. Changsha: Central South University, 2012 (in Chinese).
[12] 赵兴英,刘宝举,江南宁.蒸养参数对水泥净浆水化性能的影响[J].混凝土,2010(4):28-30.
ZHAO X Y, LIU B J, JIANG N N. Effect of the steam curing paramaters on the hydration characteristics of hardened cement paste[J]. Concrete, 2010(4): 28-30 (in Chinese).

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