Especially useful in pre-stressed concrete and other applications where. Strength The concrete strength is very high in m sand compared to river sand used in concrete. What Are The Properties Of Fresh Concrete Civil Lead Properties Of Concrete Water Cement Ratio Concrete Silica fume reduces bleeding significantly because the free water is consumed in wetting of the large surface area of the silica fume and hence the free water left in the mix for bleeding also decreases. . Special care is necessary when using fine RCA. Mix must be designed to ensure cohesion and prevent segregation and bleeding. Wooden concrete cover Block 2. Curing of concrete. ContentsCauses for Defects in Concrete StructuresStructural Defects due to Design and Detailing Structural Deficiency due to Construction Defects Other. Because it is manufactured from rock stones it will have good compressive strength. Different Types of Concrete