Lightweight Concrete Additives | High-Performance Foaming Agents for Cellular Concrete
Agentes espumantes ya compuestos químicos ko xí hñets'i'i gravedad específica da aumentan ar permeabilidad ar hormigón. nu'bu̲ da nthe̲hu̲ 'ra, Agentes espumantes ar utilizan junto ko agregados pa mejorar ár funcionabilidad. 'nehe xi da 'BATS'I reducir ar cambio volumen ar hormigón Nxoge ar curado mejorando ar hidratación ne mejora estructura poros ar espuma. Agentes espumantes ar xi 'yo̲t'e ar 'nar variedad materiales tales como gas residual, piedra caliza, yeso, ceniza volante ne arena. However, Hormigón resultante pe̲ts'i xí hñets'i'i resistencia ar compresión ngetho vacíos ndähi ya propensos da colapsar [1].
Adición 'nar estabilizador espuma wa PPF to aumentar ya propiedades mecánicas hormigón espumoso. However, Ligeros hormigones espumados hechos ko ar adición 'nar estabilizador espuma ne PPF muestran 'nar tendencia disminución jar densidad, thermal conductivity and flexural and compressive strengths as their mass percentage increases with foam agent addition from 5wt% to 7wt%. This is because the large number of pores generated by decomposition of the foaming agent can lead to an adverse effect on the pore structure.
In addition to foam stabilizer and PPF, the use of fly ash has been shown to increase the compressive strength and thermal conductivity of foamed concretes. This is because fly ash is a low-density material that participates in the hydration of cement and enhances the pore structure of foamed concrete.
The SEM image given in Figure 4 shows the microstructure of foam concrete when WMP replaced silica sand and RHA was added to the mixture. The addition of RHA has improved the pore structure of the concrete by extending the size of CSH gels. The addition of marble waste has also enhanced the pore structure by increasing the number of finer grained particles in the mix.