Physical and mechanical properties of cement-bonded boards from sludge of a recycling paper mill

Date

4-2010

Degree

Bachelor of Science in Chemical Engineering

Major Course

Major in Pulp and Paper Technology

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Menandro N. Acda

Committee Member

Teodulfo S. Delgado

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Abstract

Paper mills generate large amounts of fibrous sludge and disposal or creating use of sludge has been a challenge for the pulp and paper industry. One possibility is to use sludge to manufacture cement-bonded boards. This study was done to evaluate the suitability of recycling paper mill sludge as reinforcement for cement-bonded boards. Cement and sludge were mixed in the ratios 60:40, 80:20, and, 90:10 and used to manufacture boards. Silane coupling agent, calcium chloride, and Daracem RM were added to enhance bonding of cement particles and sludge fibers, accelerate the curing time of cement, and increase the workability of cement-sludge paste, respectively. The percent water absorption and thickness swelling and mechanical properties of the boards were measured. Mechanical properties of the board increase with increasing cement/sludge ratios. The board with 90:10 ratio produced the strongest board. On the other hand, water absorption and thickness swelling decrease with increasing cement/sludge ratios. The board with 90:10 ratio produced the most dimensionally stable board. Statistical analysis proved that cement/sludge ratios have significant effect on physical and mechanical properties of the board. Results suggest that the cement boards manufactured in this study have physical and mechanical properties comparable to those of cement boards manufactured in previous study.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Document Type

Thesis

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