Title

The combined effects of nano-montmorillonite and halloysite nanoclay to the workability and compressive strength of concrete

Date of Publication

2018

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Civil Engineering with Specialization in Structural Engineering

Subject Categories

Civil Engineering

College

Gokongwei College of Engineering

Department/Unit

Civil Engineering

Thesis Adviser

Jonathan R. Dungca

Defense Panel Chair

Lessandro Estelito O. Garciano

Defense Panel Member

"

Mary Ann Q. Adajar

Frederick Francis M. Sison

Abstract/Summary

In consideration of higher specifications for concrete, particularly in strength, the proportion of ingredients is usually modified to satisfy the mix design requirements. However, its practicality is not always appropriate in construction because of the expense and availability of the materials. Hence, additives and supplementary materials are adopted in the mix design with present studies directed to the application of nanoclay constituents to concrete technology. Consequently, the study is concerned with the utilization of nano-montmorillonite and halloyside nanoclay as partial substitutes to cement in which the workability and compressive strength of concrete is investigated at combined replacements of these nanoclays. The results show that the workability of fresh concrete generally decreased at the addition of nanoclay in the mix wherein a maximum loss of 50.000% in slump is observed for 5% replacement of the nanoclay combination. In addition, a 28th day compressive strength of 44.541 MPa is achieved as the highest among the concrete samples at 3% replacement which demonstrate an increase by 27.430% compared to a control specimen with a strength of 34.954 MPa. It is also recognized that there is parabolic trend of compressive strength with respect to the amount of nanoclay replacement which indicates that the strength of concrete continues to increase until the optimal value of nanoclay replacement is attained. It is established that the optimal replacement of nanoclay combination for a curing period of 28 days is 2.562% corresponding to a theoretical peak value of 46.060 MPa.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU21642

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

xiv, 116 leaves : illustrations (some color) ; 30 cm.

Keywords

Structural engineering; Concrete

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