The creation of cracks, which are the most common cause of structural failure, has a significant impact on the structure's strength and durability. As a result, effective repair and maintenance are vital and unavoidable for treating any of these issues. Self-healing mortar holds promising benefits for reducing the cost of repair as cracks are autonomously repaired without any human intervention. This study investigated the effect of bacteria type, bacteria content, bacteria concentration, and nutrient type on the properties of the self-healing mortar. Three types of bacteria, Bacillus sphaericus, Bacillus Megaterium, and Bacillus subtilis encapsulated in calcium alginate beads, were introduced into the mortar. Two concentrations of bacteria, 2× 108 and   2× 109 Colony Forming Units per milliliter, and different percentages of bacteria of cement weight were selected for the study. In addition, calcium lactate and calcium acetate were used at 0.5% of cement weight as nutrition for bacteria. Tests were performed for compressive strength, bending strength, SEM, EDX, and TGA/DTG. The results show a significant development in the mechanical behaviour of mortar, especially with Bacillus Megaterium using a 2.5% bacterial proportion with a concentration 2× 109 CFU/ml. This can be related to the filling of voids and cracks in microbial mortar by calcite, which was confirmed by SEM and EDX.

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Green concrete is a concept of thinking environment in concrete considering every aspect from row materials manufacture over mixture design to structural design. It has nothing to do with color.The use of various types of recycled waste materials as raw material in cement production is important recent developmental aspect in the field of cement and concrete science is, as well as the use of these materials as aggregate in the production of various types of concrete. Cement and concrete production can consume a substantial percentage of the total generated waste materials,

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Aggregates occupy more than 60% of the volume of concrete, play a main role in affecting its fresh properties as well hardened properties. The main objective of this research is to produce Self Compacting Concrete (SCC) by using a new type of coarse aggregate (Burned shale) and locally available materials in our region such as sand, limestone powder and silica fume. Experimental programme was designed to characterize the properties of fresh and hardened SCC and the performance of SCC under influence of a solution of sodium sulphate. Two cement content 450 kg/m3 and 550 kg/m3 were chosen in this research. Also silica fume was used addition with 10% and 15% of cement. Limestone Powder =10% of cement. Super plasticizer (viscocrete) was used addition with 3 % of the cement. Water cementatious ratio ranged from (0.25, 0.35). There different test methods to characteristics performance and properties of scc in the fresh state like Slump-flow test , V-funnel , L-Box , U box , Fill box .All the cube specimens of concrete mixes were removed

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