This study will deal with a new type of concrete that focuses on cement particles. As you alreadyknow today, concrete is one of the most used materials in the world, and the negative is that it has acontributing factor to pollution with as much as 5% of global carbon dioxide pollution.To reduce this, a new environmentally friendly concrete was produced that reduces pollution anddamage to the environment.The type of concrete we have studied has a higher compressive strength than the reference mix.Many tests were carried out to produce concrete that is environmentally friendly with highcompressive strength.The study will highlight the actual effect of the cement particles when large particles that perform afilling effect are not as important compared to the small particles that enter the hydration process andreplace with large particles of limestone (>0.036 mm). Through the method (Normal Limestone in anew abode), concrete has gained greater compressive strength than the reference mix.With the results achieved in this study, the construction sector is given the opportunity to useconcrete with higher strength and be more environmentally friendly in the future.

This study has investigated the effect of replacing limestone with different percentages of limestone powder (5%, 10% and 15%) using the T KS method on the compressive strength of the mortar. The results have shown that the compressive strength of the mortar has decreased with curing time (at day 14) and with an increase in the proportion of limestone powder, contrary to what has been expected. This decrease in strength was attributed to the occurrence of delayed ettringite formation (DEF) in the mortar samples. DEF is a phenomenon that occurs in concrete and mortar when the conditions for ettringite formation are not optimal, which leads to the formation of a more expansive form of ettringite at a later stage. The presence of limestone aggregates in the mortar mix has been shown to contribute to the formation of DEF, resulting in the lower compressive strength values observed. This effect becomes greater the smaller the size of the limestone granules.The results suggest that caution should be exercised when using limestone powder as a replacement in mortar mixes, as it may lead to DEF and reduced compressive strength.