The effects of sand to cement ratio on the compressive strength of lightweight concrete using pumice and polypropylene pellets as aggregates
Date
3-2011
Degree
Bachelor of Science in Civil Engineering
College
College of Engineering and Agro-Industrial Technology (CEAT)
Adviser/Committee Chair
Marloe B. Sundo,
Committee Member
Marish S. Madlangbayan, Eliseo V. Ana, Jr.
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Abstract
The study covers the use of pumice lightweight aggregate to produce lightweight concrete with polypropylene pellets for use in construction of load-bearing or non-load bearing elements. In this study, pumice aggregate lightweight concrete specimens were produced with variations in water to cement and sand to cement ratios. Parameters that have been maintained constant were the aggregate to cement ratio and the polypropylene content. All concrete specimens that were used were cured in 28 days to reach desired compressive strength and 100% relative humidity. This study primarily aims on investigating the effects of these variations on the compressive strength of lightweight aggregate concrete with the use of Type 1P cement.
The property of pumice lightweight aggregate concrete with polypropylene pellets with the range of different water and sand to cement ratios were evaluated by conducting a compression test on cylindrical specimens using the Universal Testing Machine. Experimental test results showed that increasing the sand to cement ratio improves the strength of concrete. However, for a certain water to cement ratio, increasing the sand content in the mix might cause the compressive strength to gradually increase at decreasing rate or to decrease. On the other hand, when water to cement ratio was increased, results showed that concrete strength was decreasing. Results also showed that the strength of the pumice aggregate might have been the cause of failure of concrete specimens – shearing of the coarse aggregate itself. Basically, the research showed that non-structural lightweight concrete can be produced by the use of pumice lightweight aggregate mixes with additions of polypropylene pellets without using any admixtures or strength enhancers. Since the country is considered to be in a volcanic region, the use of pumice aggregate can be practical for use in construction, if ever ordinary coarse aggregate are not available. In addition, the use of plastic in the concrete will alleviate the problems regarding solid waste management of plastics.
Language
English
LC Subject
Concrete materials, Concrete--testing
Location
UPLB College of Engineering and Agro-Industrial Technology (CEAT)
Call Number
LG 993.5 2011 E63 M35
Recommended Citation
Maluping, Philip James DC, "The effects of sand to cement ratio on the compressive strength of lightweight concrete using pumice and polypropylene pellets as aggregates" (2011). Undergraduate Theses. 1153.
https://www.ukdr.uplb.edu.ph/etd-undergrad/1153
Document Type
Thesis
