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Classification and performance of acid-resistant concrete
- Categories:company news
- Time of issue:2019-12-05 16:31
Classification and performance of acid-resistant concrete
- Categories:company news
- Time of issue:2019-12-05 16:31
Acid-resistant concrete can resist the corrosive effects of a variety of acids and most corrosive gases, and is widely used in acid-proof tanks and electroplating tanks in the chemical industry. The acid-resistant concrete developed in my country at this stage includes the following categories:
1. Water glass acid-resistant concrete
1 Introduction
Water glass acid-resistant concrete is made of water glass as cementing material, sodium fluorosilicate as hardening accelerator, and acid-resistant powder and acid-resistant coarse and fine aggregates in a certain proportion.
①The acid-resistant powder is made of diabase, acid-resistant ceramic scraps, and quartz materials.
② Acid-resistant coarse and fine aggregates are commonly used in quartzite, diabase, andesite, basalt, cast stone, etc.
③. The mixing ratio of water glass acid-resistant concrete is generally water glass: acid-resistant powder: acid-resistant fine aggregate: acid-resistant coarse aggregate = 0.6~0.7:1:1:1.5~2.0.
④The curing temperature of sodium silicate acid-resistant concrete is not less than 10℃, and the curing time is not less than 6 days.
2. Performance
① Strong acid resistance, can withstand various concentrations of tri-acid, chromic acid, acetic acid (except hydrofluoric acid, hot phosphoric acid, fluorosilicic acid) and organic solvents and other media corrosion.
②High mechanical strength. The compressive strength is about 20MPa.
③Resistant to high temperature (600℃~800℃) and rapid changes in heat and cold.
④Not resistant to alkali corrosion.
2. Sulfur acid-resistant concrete
1 Introduction
Sulfur and acid-resistant concrete is made of sulfur as the cementing material, polysulfide rubber as the toughening agent, mixed with acid-resistant powder and fine aggregate, heated (160~170℃) to make sulfur mortar, and poured into acid-resistant coarse aggregate After cooling, it becomes sulfur acid-resistant concrete.
2. Performance
①Compact structure, fast hardening, impermeability, water resistance, dilute acid resistance, resistance to most inorganic acids, neutral salts and acid salts, and high strength.
②Convenient construction, no maintenance required, especially suitable for emergency repair projects.
③Poor abrasion resistance, fire resistance, brittle properties, high shrinkage, cracks and bulging are easy to appear, it is not suitable for the parts where the temperature is higher than 90 ℃, open flame contact, alternating cold and heat, rapid temperature changes and direct impact.
Understanding the classification of acid-resistant concrete can provide practical guidance for the selection and use of concrete in engineering. I hope the above introduction can help you.
Relevant information
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