ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 04  NO. 02 APRIL 2015:

Title:          Pre-saturated Sawdust as a source of Internal curing in high performance concrete
Authors:    Iftikhar Azim, Bazid Khan, Shams-Ul-Islam, Sikandar Hayat Sajid
Abstract:   This research paper presents a parametric experimental study which investigates the use of presaturate sawdust for producing high performance concrete (low w/c ratio concrete mixtures). Pre-saturated sawdust is used as a source of internal curing by partially replacing sand. Pre-saturated sawdust is used to replace fine aggregate at three replacement levels of 5, 10 and 15% by mass respectively. The samples are subjected to different curing conditions. Compressive strength tests are conducted and comparison with control mix and unit weight analysis is also carried out. The compressive strengths of the samples without external curing for 5% replacement level are improved by 81.92%, 51.16%, 4.01% and 7.64% at 3,7,14 and 28 days respectively.While the compressive strengths of specimens with external curing for 5% replacement level are improved by 8.55%, 27.57%, 50.35 and 6.26% at 3,7,14 and 28 days respectively. The unit weight is decreased by 5.52%,10.71% and 17.49% for 5, 10 and 15% replacement levels of sawdust, respectively. The controlling factors for sawdust compressive strength are discussed and experimental results are reported.

Keywords:  Internal Curing, High Performance Concrete, Sawdust, Compressive Strength
Pages:         109-113

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