DefinePK

Abstract

Concrete is one of the widely used constructional material as it has high structural strength and stability. We do have a problem with cement production. Cement production will release a large amount of carbon-di-oxide which is the major cause of global warming and this will affect the atmosphere heavily. To avoid these problems and to make things efficient, we can go with lightweight concrete which is the expectation of the construction industry. While looking for environmental protection, the main suggestion for construction field is lightweight foamed concrete because it stands as the best thermal insulation material of external walls. When it comes to thermal insulation, another excellent heat resisting material which is used to improve the thermal insulation is Metakaolin and it is one of the effective Pozzolonic materials. In this experiment cement, fly ash, metakaolin, and protein-based foaming agent is used. Where cement is replaced with metakaolin by 5%, 10%, 15%. The specimens were exposed under the heat at 400°C, 500°C, 600°C for 3 hours. Test reports were taken for the compressive strength test (with temperature and without temperature) for the interval of 7, 14 and 28 days of curing. Specimens with different compositions were tested under normal temperature and above-mentioned temperatures for analyzing compressive strength on different time intervals. Compressive strength was taken under normal temperature and at elevated temperature; the results were compared to find the difference in strength. It is found that use of 10% of metakaolin gives high compressive strength and increasing in strength, after heating the specimen.