Strength, hydration, and microstructure of seawater sea-sand concrete using high-ferrite Portland cement

Han，Shiwen1; Zhong，Jing1; Ding，Weijian2; Ou，Jinping1

2021-08-09

10.1016/j.conbuildmat.2021.123703

CONSTRUCTION AND BUILDING MATERIALS   影响因子和分区

0950-0618

The increasing construction of marine engineering is severely limited by the scarcity of raw sources of fresh water and river sand, and thus the development of seawater sea-sand concrete (SWSSC) is urgently required. However, in the marine environment, ordinary Portland cement (OPC) suffers from sulfate attack and abrasion, et al. Instead, it has been reported that high ferrite Portland cement (HFPC) has the advantages of low hydration heat, high pervious strength, high abrasion resistance, and high corrosion resistance, and thus can potentially be a great candidate for SWSSC preparation. Here, for the first time, we systematically investigate the strength, hydration, and microstructure of SWSSC based on HFPC by compressive strength, MIP, hydration heat, TGA, and SEM-EDS. The results show that seawater sea-sand can accelerate HFPC hydration more obviously than that of OPC, increasing the 3-day concrete strength by 58.9%, and effectively solving the shortcoming of low early strength. Such acceleration is mainly due to the reaction between chloride and CAF to form Friedel's salt. Moreover, the alkalinity of different cement pastes was measured, providing a reference for durability evaluation of FRP composites in concrete. Such findings provide fundamental insights on the feasibility of eco-friendly and corrosion-resistance SWSSC based on HFPC.

High ferrite Portland cement Hydration Microstructure Seawater sea-sand concrete Strength

SCI ; EI

英语

其他

WOS:000663782700011

20212210429683

Abrasion ; Chlorine compounds ; Compressive strength ; Concretes ; Corrosion resistance ; Erosion ; Ferrite ; Heat resistance ; Hydration ; Microstructure ; Sand ; Seawater corrosion ; Sulfur compounds ; Wear resistance

Concrete:412 ; Cement:412.1 ; Seawater, Tides and Waves:471.4 ; Soils and Soil Mechanics:483.1 ; Metallography:531.2 ; Metals Corrosion:539.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85106622404

Scopus

1.School of Civil and Environmental Engineering,Harbin Institute of Technology,Shenzhen,Shenzhen,518055,China
2.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Han，Shiwen,Zhong，Jing,Ding，Weijian,et al. Strength, hydration, and microstructure of seawater sea-sand concrete using high-ferrite Portland cement[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,295.

Han，Shiwen,Zhong，Jing,Ding，Weijian,&Ou，Jinping.(2021).Strength, hydration, and microstructure of seawater sea-sand concrete using high-ferrite Portland cement.CONSTRUCTION AND BUILDING MATERIALS,295.

Han，Shiwen,et al."Strength, hydration, and microstructure of seawater sea-sand concrete using high-ferrite Portland cement".CONSTRUCTION AND BUILDING MATERIALS 295(2021).