Research on the high-strength concrete using local materials for infrastructure construction in the coastal areas of Kien Giang

Abstract

Kien Giang is a coastal province located in the southwest of Vietnam with a coastline of about 200 km. Through surveys, corrosion and destruction of concrete and reinforced concrete structures have occurred very commonly in coastal constructions here. Therefore, the research and production of high-strength concrete from local materials for the construction of coastal infrastructure in Kien Giang is very necessary. On the other hand, high-strength concrete uses fine and ultra-fine particles, which have formed a structure with high density, low permeability and good corrosion resistance in corrosive environments. Therefore, high-strength concrete is the preferred material for use in coastal and island infrastructure projects in Kien Giang province (Vietnam). This paper presents the results of a study on some physical and mechanical properties of high-strength concrete using local materials. The experimental results show that high-strength concrete samples containing Duyen Hai 1 thermal power plant fly ash and silica fume SF-90 with different mixing ratios all have good workability (spread 430÷630 mm and slump:
16÷21 cm) and compressive strength at 28 days from 53.7 MPa to 70.7 MPa. In addition, the study has determined the failure time of samples in the test of steel protection capacity according to NT Build 356-2009 standard. The experimental results show that the high-strength concrete sample with 10% silica fume has the longest failure time, about 80 days. These results show that high-strength concrete made from locally available material mixtures can meet the requirements for use in infrastructure projects in coastal areas of Kien Giang.

Keywords: High-strength concrete; fly ash; silica fume; infrastructure projects; coastal and islands.