Amante, Charmaine E.

A study on the compressive strength of a compressed pillar block using fly ash and cement - Cebu City CIT-U 2015

This research, entitled ?A Study on the Comprehensive Strength of a Compressed Pillar Block Using Fly Ash and Cement?, is carried out to develop a new wall building material made of fly ash and cement which can offer better quality structures at a lower cost and that can lead to the conservation of natural resources and improvement in environment quality.
Compressed fly ash blocks (CFAB) can be extensively used in some building constructional; activities similar to that of common compressed earth blocks. The CFAB are comparatively lighter in weight than common compressed earth blocks. Since fly ash is being accumulated as waste material in large quantity near thermal power plants and creating serious environmental pollution problems, its utilization as main raw in the manufacture of blocks will not only create ample opportunities for its proper and useful disposal but also help in environmental pollution control to a greater extent in the surrounding areas of power plants.
Around 600 metric tons of fly ash and 300metric tons of bed ash get accumulated every month at the Korean Electric Power Company (kEPCO) in the City of Naga in Southern Cebu, which causes considerable damage to the environment. Internationally, fly ash is considered as a by-product which can be used for many applications.
The main objective of this study is to compare the comprehensive strength of the CFAB with Interlocking Compressed Earth Blocks (ICEB) of Philippine Action for Community-led Shelter Initiative Corp[oration (PACSII)and present other information discovered regarding their other properties in a most concise, compact and the to the point manner. Various laboratory experiments were carried out of both CFAB and PACSII?s ICEB samples such as compressive strength test, water absorption, specific gravity, density, unit weight, hardness, toughness, drop test, and manual scratch resistance test.
From the findings of the compressive strength test, the CFAB is lesser than that of PACSII?s ICEB. Based from the results, it was discovered that ratio 2 of CFAB with 10% cement and 90% fly ash, with 28 days curing age, has reached 2.1 MPa which could be used as a non-load bearing wall material, based on Appendix C. the strength of the CFAB can be improved by investigating block mixtures containing admixtures, considering that this new material will still be economical and sustainable; and this can be recommended to the future researchers. As regards to other properties that had been investigated, lots of observations were noted at Chapter 4. Economically, the production cost of CFAB is lesser than the production cost of PACSII?s ICEB. In fact, based on ratio 3 which has the biggest cost among the three ratios, the cost of CFAB is 50.32% lesser than the cost of PACSII?s block.
Even though further studies will be required before a final comment is made, the CFAB produced in this study seems to be suitable for use as construction material. The production of this type of blocks, if viable technically and commercially, will certainly contribute to the recycling of the fly ash and hence, minimize the negative impact on the environment.



T Am135 2015