Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13208
Title: Effect of newly developed lignosulphonate superplasticizer on properties of cement pastes and mortars
Authors: SUN DAO JUN
Keywords: cement hydration; compressive strength; lignosulphonate; pore structure; setting times; workability retention
Issue Date: 8-May-2008
Source: SUN DAO JUN (2008-05-08). Effect of newly developed lignosulphonate superplasticizer on properties of cement pastes and mortars. ScholarBank@NUS Repository.
Abstract: Lignosulphonate (LS) has been widely used in concrete as regular water reducers for decades. With newly developed modified LS superplasticizer, it is possible to produce self-compacting concrete. However, not much information is available on the effect of the LS superplasticizer on cement hydration, workability retention, and pore structure of pastes in comparison to those of naphthalene (SNF) and polycarboxylate (PCE) based superplasticizers and to those of regular LS water reducing admixtures. The present research was, therefore, carried out. Two modified LS, one PCE, one SNF superplasticizers and two regular LS water reducing admixtures at two w/c ratios of 0.34 and 0.40 were studied. Mortars and cement pastes were designed to have similar initial yield stress. The results indicate that the LS superplasticizers influenced cement hydration, setting times, workability retention, pore structure and compressive strength differently, compared to other non-LS superplasticizers and the regular LS water reducing admixtures.
URI: http://scholarbank.nus.edu.sg/handle/10635/13208
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