nanobuild-4-2015-pages-121-142

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UDC 691

Application of ultra cellulose fiber for the enhancement of the durability

and shrinkage of cement pastes exposed to normal and aggressive curing

conditions

Author: Saaid I. Zaki, Professor in Q.C. and Material Institute, Housing and Building National Research Center, Egypt; Tahreer street, 87, dokki, Cairo, Egypt, 11511, Post box no 1770, saaid_zaki@yahoo.com

Extended Abstract: Ultra Cellulose Fibers are hydrophilic fibers which can hold most of their

weight water when it is mixed into concrete, after concrete is hardened, these fibers will slowly release this water to unhydrated cement during the critical early phases of curing which assist in more complete hydration, this internal self curing action results in more completely hydrated cement which contributes to more strength development and more control of internal microcracking, particularly when normal curing is not adequate. Also, these fibers can be used easily in ready mixed concrete batch plants and in hot weather environments. The results indicated clear improvements in both the shrinkage and compressive strength of all cement paste mixes contained these fibers in comparison with control ones in both normal and aggressive curing conditions.

Key words: Ultra Cellulose Fibers(UCF), self curing action, hydrophilic fibers, drying shrinkage, aggressive curing.

DOI: dx.doi.org/10.15828/2075-8545-2015-7-4-121-142

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