Effects of Protective Agents on Carbonation Resistance of Fair-Faced Concrete

Abstract

Abstract: Fair-faced concrete protective agent has excellent waterproof performance and excellent environmental protection performance. It can greatly prolong the service time of buildings being built with fair-faced concrete. For drawing the accurate conclusion that protective agents effects on carbonation resistance of fair-faced concrete, the test for the effect was done with permeable water-soluble silicone protective agent and acrylic film forming agent for protection. The test results show that both film forming agent for protection and permeable water-soluble silicone protective agent can effectively reduce the carbonation depth of fair-faced concrete, and the function of film forming agent for protection is better than that of permeable water-soluble silicone protective agent. Both the carbonation depths of test pieces coated with two different types of protective agents decrease along with the increase of curing age. Curing age and permeable protective agent can act separately while curing age and film forming agent for protection can boost each other, and the carbonation depth of fair-faced concrete can be further reduced because of the mutual action between the curing agent and the film forming agent for protection. A prediction model of the carbonation depth of fair-faced concrete was built. The influences of type and thickness of protective agents on carbonation resistance of fair-faced concrete were considered while being built.

Key words: fair-faced concrete, type of protective agent, thickness of protective agent, carbonation depth, curing age, prediction model

CLC Number:

TU528

WEI Yu, CHEN Pang, ZHANG Guilin, RONG Xian, ZHAO Wenzhong. Effects of Protective Agents on Carbonation Resistance of Fair-Faced Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(1): 85-91.

References

[1] 郭伟,路林海,王龙志,等.清水混凝土概念、研究现状、存在问题及配合比设计方法综述[J].混凝土与水泥制品,2016(10):23-27.
GUO W, LU L H, WANG L Z, et al. Summary for concept, research status, existing problems and mix proportion design of fair-faced concrete[J]. China Concrete and Cement Products, 2016(10): 23-27 (in Chinese).
[2] ROZIÈRE E, LOUKILI A, CUSSIGH F. A performance based approach for durability of concrete exposed to carbonation[J]. Construction and Building Materials, 2009, 23(1): 190-199.
[3] STEFFENS A, DINKLER D, AHRENS H. Modeling carbonation for corrosion risk prediction of concrete structures[J]. Cement and Concrete Research, 2002, 32(6): 935-941.
[4] TAFFESE W Z, SISTONEN E, PUTTONEN J. CaPrM: carbonation prediction model for reinforced concrete using machine learning methods[J]. Construction and Building Materials, 2015, 100: 70-82.
[5] SHAH V, MACKECHNIE J, SCOTT A. Determination of carbonation resistance of concrete through a combination of cement content and tortuosity[J]. Journal of Building Engineering, 2022, 60: 105176.
[6] CAI C Q, GUO Q S, LI X. Experimental research on durability of fair-faced concrete[C]//Advanced Materials Research. Trans Tech Publications Ltd, 2012, 535: 1693-1696.
[7] LOLLINI F, REDAELLI E. Carbonation of blended cement concretes after 12 years of natural exposure[J]. Construction and Building Materials, 2021, 276: 122122.
[8] HUY VU Q, PHAM G, CHONIER A, et al. Impact of different climates on the resistance of concrete to natural carbonation[J]. Construction and Building Materials, 2019, 216: 450-467.
[9] 李刚,王鹏刚,康悦,等.碳化作用对清水混凝土表面色泽一致性的影响[J].青岛理工大学学报,2019,40(4):13-18+70.
LI G, WANG P G, KANG Y, et al. Effect of carbonation on surface color consistency of fair-faced concrete[J]. Journal of Qingdao University of Technology, 2019, 40(4): 13-18+70 (in Chinese).
[10] ZHANG Z Z, ZHANG Y P, MA J Q, et al. The influence of fair-faced concrete protective agent on the resistance to freezing and thawing of concrete[J]. Integrated Ferroelectrics, 2021, 215(1): 166-178.
[11] 李松凡.清水混凝土保护剂对混凝土耐久性影响研究[D].郑州:中原工学院,2018:5-6.
LI S F. Research of the durability effect of several protectants applied during the formation of fair-faced concrete[D]. Zhengzhou: Zhongyuan University of Technology, 2018: 5-6 (in Chinese).
[12] 李慧艳,方月华,肖葵,等.干热大气环境中涂层材料失效行为研究进展[J].科技导报,2012,30(34):76-79.
LI H Y, FANG Y H, XIAO K, et al. Progress of failure behavior of coatings in hot and dry atmosphere environment[J]. Science ＆ Technology Review, 2012, 30(34): 76-79 (in Chinese).
[13] 徐永祥,严川伟,高延敏,等.大气环境中涂层下金属的腐蚀和涂层的失效[J].中国腐蚀与防护学报,2002,22(4):249-256.
XU Y X, YAN C W, GAO Y M, et al. Underfilm corrosion of metals and failure of organic coatings in atmosphere[J]. Journal of Chinese Society for Corrosion and Protection, 2002, 22(4): 249-256 (in Chinese).
[14] 冷发光,戎君明,丁威,等.《普通混凝土长期性能和耐久性能试验方法标准》GB/T 50082—2009简介[J].施工技术,2010,39(2):6-9.
LENG F G, RONG J M, DING W, et al. Introduction of revised standard for test methods of long-term performance and durability of ordinary concrete GB/T 50082—2009[J]. Construction Technology, 2010, 39(2): 6-9 (in Chinese).
[15] 蒋一兵.涂装检查参考手册[M].北京:化学工业出版社,2014:66-67.
JIANG Y B. Reference manual for painting inspection[M]. Beijing: Chemical Industrial Press, 2014: 66-67 (in Chinese).
[16] 李芳,张云鹏,李松凡,等.清水混凝土保护剂对混凝土吸水率的影响[J].河南科学,2018,36(7):1075-1079.
LI F, ZHANG Y P, LI S F, et al. Effect of fair-faced concrete protectant on water absorption of concrete[J]. Henan Science, 2018, 36(7): 1075-1079 (in Chinese).
[17] RATHNARAJAN S, DHANYA B S, PILLAI R G, et al. Carbonation model for concretes with fly ash, slag, and limestone calcined clay-using accelerated and five-year natural exposure data[J]. Cement and Concrete Composites, 2022, 126: 104329.
[18] 胡晓鹏,孙广帅,张成中,等.混凝土早期碳化性能的试验研究[J].西安建筑科技大学学报(自然科学版),2017,49(4):492-496.
HU X P, SUN G S, ZHANG C Z, et al. Experimental study on early carbonation of concrete[J]. Journal of Xi’an University of Architecture ＆ Technology (Natural Science Edition), 2017, 49(4): 492-496 (in Chinese).
[19] 中国工程建筑标准化协会.混凝土结构耐久性评定标准:CECS 220—2007[S].北京:中国计划出版社,2007.
China Engineering Construction Standardization Association. Concrete structure durability assessment standard: CECS 220—2007[S]. Beijing: China Planning Press, 2007 (in Chinese).