Abstract
This study investigates the effect of carbon nanotube (CNT) dispersion on the mechanical properties and microstructures of ultra-light foamed concrete. A type of uniform and stable CNT dispersion solution is obtained by adding nano-Ce(SO4)2. Results show that CNT dispersion increases the compressive and breaking strengths of foamed concrete. CNTs play a nuclear role in the crystallization of C–S–H, and CNT dispersion effectively promotes the grain growth of C–S–H. The effect of CNT dispersion on the compressive and breaking strengths of foamed concrete is predicted through simulation.
Highlights
Foamed concrete is typically composed of cement, fly ash, foam, and water
This study aimed to develop a new type of carbon nanotube (CNT) dispersion method for enhancing the mechanical properties and microstructure of ultra-light foamed concrete
The effects of different contents of nano-Ce(SO4 )2 on CNT dispersion are reported
Summary
Foamed concrete is typically composed of cement, fly ash, foam, and water. The foam in the concrete generates a large number of air pores with diameters ranging from 1 mm to 3 mm.the density of foamed concrete generally ranges from 200 kg/m3 to 2000 kg/m3 [1].In particular, low-density foamed concrete (≤300 kg/m3 ) is regarded as ultra-light foamed concrete.Substantial theoretical research and engineering experience suggest that ultra-light foamed concrete is unstable [2]. Foamed concrete is typically composed of cement, fly ash, foam, and water. The foam in the concrete generates a large number of air pores with diameters ranging from 1 mm to 3 mm. The density of foamed concrete generally ranges from 200 kg/m3 to 2000 kg/m3 [1]. Low-density foamed concrete (≤300 kg/m3 ) is regarded as ultra-light foamed concrete. Substantial theoretical research and engineering experience suggest that ultra-light foamed concrete is unstable [2]. The inevitable instability of ultra-light foamed concrete usually results in poor mechanical properties, such as compressive and breaking strengths, which limit the application of this material
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