Effect of treated sewage sludge (Biosolids) as partial cement replacement on the flexural strength of concrete

Date

6-2015

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Nimfa Maren S. Tabucal

Abstract

Sewage sludge is a by-generated during wastewater treatment. Reuse and disposal of sewage sludge can only be done after it has been treated After treatment,sludge is converted to biosolids. Since disposal of biosolids mat still cause harm to public health and environment, reusing or recycling it is more preferred. Several studies have been investigating the reuse of biosolids as a raw material in the construction industry , especially in concrete production. In this study, biosolids were used as partial cement replacement. The biosolids used in the study were acquired from a treatment facility located in Bay, Laguna. Varying percentage of cement was replaced by biosolids. These percentages were:0% (control), 5%, 10%, and 15% percent. Thus, four different mixtures of concrete were created. The workability of each mixture was determined using the slump test. For each mixture, three concrete specimens were produced. All concrete specimens were cured for a duration of 28 days. Finally, the flexural strength of each specimen was tested using the center-point loading test. After testing, it was found out that the workability and flexural strength decreases as the percentage of cement replaced by biosolids increases. When biosolids replaced more than 55 of cement, the decrease in the flexural strength of concrete became significant.

Language

English

Location

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

Call Number

LG 993.5 2015 E63 /E44

Document Type

Thesis

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