An investigation on the use of superplasticizer in palm kernel shell aggregate concrete

✍ Scribed by Fidelis O. Okafor

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 374 KB
• Volume: 21
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(91)90105-q

✦ Synopsis

The performance of a superplasticizin s admixture in concrete made from palm kernel shell aggregate was investigated.

Three concrete mixes of widely differing water/cement ratios were made and each of the mix contained three different dosage levels of the superplasticizer.

The properties tested include workability of the fresh concrete~ saturated density and compressive strength of the hardened concrete.

These properties were compared with those of similar concrete mixes made without admixture.

It was observed that superplasticizer has appreciable fluidifying action in the fresh concrete so that~ under appropriate conditions, it either considerably improved the workability of the fresh concrete at normal water content or permitted a water reduction of at least 9% to be made while maintainin G a Given workability.

Results of the tests also show that the strength of the superplasticized concrete increased with increase in dosage level of the superplasticizer and that the compressive strength values obtained at ages from 7 days to 180 days exceeded those to be expected from water reduction alone.