Abstract
AbstractThe behavior of non-reinforced green mortar with fibers has been observed. Different green mortar mixes have been prepared using different percentages of waste glass powder (WGP), steel slag (SG) and silica fume (SF).The properties of flow, density, ultrasonic pulse velocity (UPV), compressive and flexural strengths have been tested for such green mortar in the first phase of the experimental work. The selected green mortar mix that gives good properties with the acceptable ranges of cement replacement by such cementitious materials has been utilized to achieve the second phase of the experimental work. Thus, the uses of human hair fibers, sisal fibers and stainless steel nails fibers in the form of individual and hybrid fibers system and testing for the same properties mentioned above have been performed. The third phase includes the cost estimation for the said mortar. Whereas, the last phase deals with analysis of the results using the integrated AHP and TOPSIS method for selection the best performance of the green mortar. The results of mono sisal fiber, human hair fiber and stainless nails fiber by 0.75, 0.75 and 2% of volume fraction respectively, exhibited the highest increase in compressive strength, flexural strength, UPV and density compared with other percentages.
Highlights
Cement is the one of the most produced materials in the world
The average of three values of compressive strength of mortar prepared for measuring the pozzolanic activity of waste glass powder, steel slag or silica fume are shown in (Figure 2)
The ratio between compressive strength of mortar containing supplementary cementitious material and compressive strength of control mortar at the same age is called activity index which assesses the pozzolanic activity of the supplementary cementitious materials as displayed in (Figure 2)
Summary
Cement is the one of the most produced materials in the world. Annual global cement production has been estimated at 4.15 billion tons in 2016, and is expected to in-. The incorporation of steel fibers in concrete and mortar has been documented by many researchers [58, 59] This type of fibers have characterized by high elastic modulus, tensile strength, flexural rigidity and gain good properties to mortar and concrete. Stainless steel nails fibers are recognized by low cost and good properties Utilization this type of fibers can contribute to increase the compressive strength, flexural strength and other properties of concrete [42]. Many literatures are available for combination silica fume and pozzolanic materials in the mortar or concrete, their utilization with three different types of the fibers (sisal fibers, human hair fibers and low cost stainless steel nails) to produce reinforced green mortar is still limited. Selecting and ranking the best green mortar based on its properties and cost
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