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Problem statement: Mortar mix is a major construction material in fabrication of ferrocement&#13; structural elements. However, there have been scarce amount of technical data available on suitable mix&#13; proportion to achieve structural grade mortar with specific strength requirement and adequate level of&#13; workability for proper placement into construction formwork. Moreover, current practice in ferrocement&#13; construction work which uses mortar mix with cement: sand ratio ranging between 1:1.5 to 1:2 incurs high&#13; requirement of cement yet producing mix with suboptimum level of compressive strength. Approach: An&#13; experimental investigation was carried out to evaluate workability and compressive strength properties of&#13; structural grade mortar mixes with various cement: sand ratios ranging from 1:2.0-1:2.75 and varying&#13; water/binder ratio between 0.35 and 0.50. Throughout the laboratory investigation, a total of 28 batches of&#13; mortar mixes with various mix proportion were designed, cast and tested in accordance to relevant standards&#13; of practice prescribed by British Standard Institute (BSI) and American Society of Testing Material&#13; (ASTM). Results: At the end of the laboratory investigation program, high performance mortar mix with&#13; compressive strength exceeding 55 MPa and slump level within 50-90 mm which is suitable for heavy duty&#13; ferrocement construction work was successfully developed. Moreover, data on mix proportion for several&#13; other grades of mortar mixes ranging from grade 35 to grade 55 were also derived. Conclusion: It was&#13; found that optimum cement: Sand ratio of structural mortar is 1:2.25. With the use of this cement: Sand ratio&#13; in the production of structural grade mortar mix in fabrication of ferrocement structural elements,&#13; consumption of cement binder will be economized hence resulting in potential savings in term of material&#13; and production cost of mortar mix in the construction industry. Besides, it was also observed that strengths&#13; of mortar mixes do not vary linearly with cement content of the mix

Optimization of Mix Proportion of High Performance Mortar for Structural Applications