EFFECTS OF FLY ASH ADDITION ON THE DURABILITY AND MECHANICAL PERFORMANCE OF FIRED CLAY BRICKS

Anuwat  Srisuwan; Siwat  Lawanwadeekul; Chiawchan  Saengthong; Siriwan  Artbumrung; Nonthaphong  Phonphuak

Authors

Anuwat Srisuwan Faculty of Liberal Art and Science, Sisaket Rajabhat University, Muang, Sisaket 33000, Thailand.
Siwat Lawanwadeekul Faculty of Industrial Technology, Lampang Rajabhat University, Lampang, 52100, Thailand.
Chiawchan Saengthong Faculty of Liberal Art and Science, Sisaket Rajabhat University, Muang, Sisaket 33000, Thailand.
Siriwan Artbumrung Department of Industrial Technology, Faculty of Engineering, Rajabhat Maha Sarakham University, Maha Sarakham 44000, Thailand.
Nonthaphong Phonphuak Department of Industrial Technology, Faculty of Engineering, Rajabhat Maha Sarakham University, Maha Sarakham 44000, Thailand.

Keywords:

Fly ash, porosity, clay brick, mechanical

Abstract

The main objective of this study was the utilization of fly ash (FH) additive in the fired clay brick mixtures. The effects of FH additions (0, 10, 20, 30, and 40% by weight) incorporated in clay brick compositions on the physical properties and mechanical strength had been investigated. The green clay brick specimens were fired at 800-1,000C to obtain vitreous phase connection. Behavior of packed particles associated apparent porosity (APP), bulk density (BD) and water absorption (WA) values were reported, which were directly cased in the compressive strength (CS) of the fired specimens. The results showed that the APP and WA values were also decreased, while BD values were improved with an increase in sintering temperatures. The CS of clay brick specimens with 10 and 20 wt% of FH after fired at 1,000C had higher than of the CS strength standard value as required by ASTM C62-13a. The optimum FH addition in the fired clay bricks at 1,000C was achieved in 10 wt%FH, which confirmed a partial replacement of additive wastes in making fired clay bricks.

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