HomeMSEUF Research Studiesvol. 15 no. 1 (2013)

Prototype Development of Blended Concrete Roof Tiles

Ramela B. Ramirez | Renato R. Zabella

Discipline: Engineering



The study is an R and D in which evolutionary prototyping was undertaken for a period of one (1) year. After the first sample was developed and tested, improvements were incorporated in the fabrication of another set of samples until the desired properties of the prototype were achieved. Designed and fabricated molds were used in the pouring and curing of the prototype. International procedures and standards were applied in the curing of prototype and in laboratory testing. The design of the prototype of blended concrete roof tile was conceptualized based on principles of construction material / product development where production cost, structural and mechanical properties were considered. Environmental protection is a primary concern of this study, thus, contributing to sustainability and green engineering concepts by reusing available waste from power plant as constituents for the blended concrete roof tile. Computations, analysis and evaluation of gathered data were done using scientific GAPSA method of problem solving. The resulting prototype utilized Portland cement, sand, bottom ash, and water. Concrete mold with 420 mm x 330 mm dimension was used. It has a minimum of 17.5 mm pitch, minimum head lap of 75 mm , side lap of 30 mm , and batten spacing of 320 mm up to 345 mm. It is lightweight with a unit weight of 16.448 kN/m3 and is comparable to other roofing materials as it has a compressive strength of 1329.56 psi. It is incombustible and fully fire resistant, a poor electrical conductor and durable. Compared to other concrete roof tiles available in the market, it is has a lesser cost at Php 18.35 per tile.