The Physical and Mechanical Properties of Autoclaved Aerated Concrete (AAC) with Recycled AAC as a Partial Replacement for Sand

Buildings

Atthakorn Thongtha¹  Md Saleh Noorashikin²  Ahmad Fazlizan³  Nilofar Asim³  Abdul Rahman Rafiza³ 

[1] Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand;Research Centre for Sustainable Process Technology (CESPRO), Chemical Engineering Programme, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia;Solar Energy Research Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia;

关键词: lightweight concrete;    autoclaved aerated concrete (AAC);    physical properties;    mechanical properties;    recycled AAC;   

DOI  :  10.3390/buildings12010060

来源: DOAJ

【 摘 要 】

The application of AAC has increased considerably in Malaysia since the 1990s. The usage of AAC has some advantages, but it also has negative environmental impacts since rejected concrete will become landfill. This study aimed to use AAC waste powder as a material that would partially replace the sand content to produce a new form of Autoclaved Aerated Concrete (AAC). The physical and mechanical properties of the newly developed AAC were investigated. This paper presents improved mechanical and physical properties of the new form of recycled AAC concrete. Besides these improvements, using recycled AAC could lower production costs. Furthermore, the usage of this recycled waste powder is both economically and environmentally advantageous. This study found that when recycled AAC was substituted for sand, AAC with a fine recycled powder content of 30% had a compressive strength that was around 16% higher than conventional AAC and between 29% and 156% higher than any value attained utilizing an industrial waste product. This study also confirmed that the greater strength could be identical to a higher tobermorite phase and that the recycled AAC surface showed a finer crystalline morphology.

【 授权许可】

Unknown