Investigation on the compressive strength of rice husk ash based geopolymer material cured at different oven temperature

Date

6-2016

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Nimfa Maren S. Tabucal

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

With the increasing demand for cement and increasing volume of wastes in the form of rice husk ash (RHA), engineers have been in constant pursuit in recycling these wastes to incorporate it in construction process. One of the innovations that are being studied today is geopolymer material. It is an alumnosilicate based material that undergoes thermal activation which then hardens through time. With its promising potentials, geopolymer is hoped to replace concrete in the future. This study aimed to know the compressive performance of geopolymer cured at different oven temperature and to recommend a standard curing temperature for future geopolymer researches. A definite mixture of RHA, fine and coarse aggregates, sodium hydroxide, sodium silicate, and water was used. Also, traditional concrete making techniques were adopted in making the geopolymer material. Different sets of specimens were subjected for different curing temperature set A for ambient temperature, set B for 100°C, set C for 125°C, and set D for 150°C. Compressive strength of specimens were obtained using Universal testing Machine (UTM) in accordance with ASTM C39 Standard Method for Compressive Strength Test of Cylindrical Concrete. The obtained compressive strength of specimens A, B, C, and D are 0.180 MPa, 0.202 MPa, 0.244 MPa, and 0.660 MPa, respectively. It has been observed that increasing the curing temperature also increases the compressive strength of the geopolymer material. However, even with the aid of elevated curing temperature, the obtained compressive strength was still not sufficient for structural purposes. To further increase the mechanical properties of the geopolymer material, it is suggested that researches on ther parameters such as sodium hydroxide to sodium silicate ratio, RHA to activator ratio, molarities of chemicals and duration of curing should be conducted. Moreover, a 150°C curing temperature is recommended for further geopolymer researches.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2016 E63 /G33

Document Type

Thesis

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