Evaluation of Delayed Addition of Superplasticizer in Standard Concrete

Author(s): Mohit R., Sourabh T., Mohit K., Devender K., and Pardeep K.
Paper category: Proceedings
Book title: Proceedings of International Conferences (ICACMS) Advances in Construction Materials and systems Vol 2
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-194-0
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 64-72
Total Pages: 9
Language : English

Abstract: Superplasticizer (SP) has become the most important as well as a mandatory ingredient in modern concrete. It is known for increasing the workability with lower water content. Although the operational methods and techniques, including the mechanisms of superplasticizer’s potential and performance in concrete are well known, issues regarding cement-superplasticizer incompatibility are recurrently seen in field applications. In this study, laboratory findings on cement concrete were reported which includes the effect of delayed addition of superplasticizer in concrete from the time of adding water into the mix. Outcomes of previous researches which studied the effect of SP on fresh concrete, for example, slump loss, have been reviewed prior to this study. Comparison of effect of delayed addition of two superplasticizers with a different chemical composition based on modified lignosulphonate polymers (MLP) and sulphonated naphthalene polymers (SNP) has been carried out. A design mix of M30 grade was evaluated for the change in the physical properties: (a) compressive strength and (b) split-tensile strength, on delayed addition of these superplasticizers. The effect of delay in addition of superplasticizers was manifested which was observed in terms of variation in the physical properties of concrete.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00