EFFECT OF ADDING MICRO-VEGETABLE FIBER IN THE MIX DESIGN AND RESISTANCE OF SELF COMPACTING CONCRETE
A micro vegetable fiber resulting from paperboard recycling is introduced into self-compacting concrete (SCC) and its equivalent mortar (CEM) used to help in the SCC Mix design.Six different fiber volumes were added to the CEM mixes: 10％, 15％, 20％, 30％, 60％ and 100 ％ by volume of binder. Fibers effect on the grading of solid skeleton and its compactness through the concept of the packing factor is investigated.The water absorbed by the fibers is about 670％ in mass. When fiber percentage increases, the required amount of water for the SCC mix design increases too and an additional quantity of filler must be added to maintain constant water/binder (w/b= 0.35) ratio.The superplasticizer dosage was found experimentally by considering a ratio of 2 between the spread of mortar and that of the target self compacting concrete.The experimental results show that 15％ micro fiber reinforced equivalent mortars have the higher strengths. Tests are then conducted on both reference and fiber-reinforced SCC made with 15％ of micro fiber by volume of binder. At an early age (less than 3 days) the addition of micro-fibers does not affect the resistance while it is an effective method to increase the tensile strength and therefore to reduce the shrinkage cracking as the concrete age is higher than 7 days.
SCC CEM Based vegetable fiber
M.A.S.Mohamed G.Wardeh E.Ghorbel
L2mgc,University OfCergy-Pontoise,5 Mail Gay Lussac 95031 Cergy-Pontoise Cedex,Cergy-Pontoise, Franc L2mgc,University OfCergy-Pontoise,5 Mail Gay Lussac 95031 Cergy-Pontoise Cedex,Cergy-Pontoise,France
国际会议
长沙
英文
162-173
2009-06-05（万方平台首次上网日期，不代表论文的发表时间）