Durability Design of Concrete Structures in Severe Environments

Abstract:

Concrete has a high performance corrosion resistance, with the choice of the thickness of the active alkali aggregate,grain shape structured,well-graded,small porosity. Superfine cement with mineral powder instead of 30% to 50%, mineral superfine powder participate hydration, solve concrete interface structure Ca (OH) ₂ enrichment and directional crystallization problems, improve the coagulation. The internal structure of the soil, improving the strength and density of concrete. Meanwhile ultra-fine powder mixed with minerals, reducing the C₃A content in the powder and the concrete in the late ettringite hazards greatly. Improve the corrosion resistance of concrete, with also improve the internal structure of concrete and the strength of concrete, compactness and corrosion resistance. Composite type superplasticizer, reducing water consumption unilateral concrete, air-entraining agent is added to improve the density of concrete, the concrete has good impermeability and frost resistance. On the use of ordinary portland cement, it gets high performance, by the ratio test, developed the corrosion and frost resistance of concrete for the chloride, sulfate alone or jointly under the action of the environment concrete structures in corrosive environments, such as coastal areas, inland lakes, underground sewage or chemical zones, there are concrete structure durability requirements, with good economic and promotional value.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 218-222
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.218
• Online since: October 2014
• Authors: Lin Xu
• Keywords: Corrosion-Resistant Concrete, Ordinary Portland Cement, Ultra-Fine Mineral Powder

References

[1] The durability of concrete structures design specifications, (GB/T50476-2008).

[2] Technical Specification for Concrete Mix Design, (JGJ55-2011).

[3] Ordinary concrete long-term performance and durability test methods, (GB/T50082-2009).

[4] Standard consistency water cement setting time and soundness detection method, (GB/T1346-2001).

[5] Cement mortar strength test method , (GB/T17671-1999).

[6] Concrete admixture homogeneity test methods , (GB/T8077-2000).

[7] Collepardi M, Troli R, Bressan M, Liberatore F, Sforza G. Crack-free concrete for outside industrial floors in the absence of wet curing and contraction joints. Cem Concr Compos 2008; 30(10): 887–891.

DOI: 10.1016/j.cemconcomp.2008.07.002

[8] Tongaroonsri S, Tangtermsirikul S. Influence of mixture condition and moisture on tensile strain capacity of concrete. Science Asia 2008; 34: 59–68.

[9] Kim JK, Han SH, Song YC. Effect of temperature and aging on the mechanical properties of concrete Part I. Experimental results. Cem Concr Res2002; 32: 1087–1094.