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      • KCI등재후보

        Strength and chloride penetration of Portland cement mortar containing palm oil fuel ash and ground river sand

        Sumrerng Rukzon,Prinya Chindaprasirt 사단법인 한국계산역학회 2009 Computers and Concrete, An International Journal Vol.6 No.5

        This paper presents a study of the strength and chloride penetration of blended Portland cement mortar containing ground palm oil fuel ash (POA) and ground river sand (GS). Ordinary Portland cement (OPC) was partially replaced with POA and GS. Compressive strength, rapid chloride penetration test (RCPT) and chloride penetration depth of mortars were determined. The GS only asserted the packing effect and its incorporation reduced the strength and the resistance to chloride penetration of mortar. The POA asserted both packing and pozzolanic effects. The use of the blend of equal portion of POA and GS also produced high strength mortars, save cost and excellent resistance to chloride penetration owing to the synergic effect of the blend of POA and GS. For chloride depth, the mathematical model correlates well with the experimental results. The computer graphics of chloride depth of the ternary blended mortars are also constructed and can be used to aid the understanding and the proportioning of the blended system.

      • KCI등재후보

        Mathematical model of strength and porosity of ternary blend Portland rice husk ash and fly ash cement mortar

        Sumrerng Rukzon,Prinya Chindaprasirt 사단법인 한국계산역학회 2008 Computers and Concrete, An International Journal Vol.5 No.1

        This paper presents a mathematical model for strength and porosity of mortars made with ternary blends of ordinary Portland cement (OPC), ground rice husk ash (RHA) and classified fly ash (FA). The mortar mixtures were made with Portland cement Type I containing 0-40% FA and RHA. FA and RHA with 1-3% by weight retained on a sieve No. 325 were used. Compressive strength and porosity of the blended cement mortar at the age of 7, 28 and 90 days were determined. The use of ternary blended cements of RHA and FA produced mixes with good strength and low porosity of mortar. A mathematical analysis and two–parameter polynomial model were presented for the strength and porosity estimation with FA and RHA contents as parameters. The computer graphics of strength and porosity of the ternary blend were also constructed to aid the understanding and the proportioning of the blended system.

      • KCI등재

        Use of Ternary Blend of Portland Cement and Two Pozzolans to Improve Durability of High-strength Concrete

        Sumrerng Rukzon,Prinya Chindaprasirt 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.6

        This paper presents the use of ternary blend of Portland cement with two pozzolans in producing high-strength concrete. PortlandCement Type I (CT) was partially replaced with ground Bagasse Ash (BA), ground rice husk-bark ash (RB) and Fly Ash (FA) at thedosage levels of 20% and 40% by weight of binder. In addition to a single material replacement, a blend of equal weight portions ofRB and FA; and BA and FA were used. Compressive strength, porosity, chloride penetration, corrosion resistance and modulus ofelasticity of concretes were determined. Test results reveal that the resistance to chloride penetration of concrete improvessubstantially with partial replacement of CT with a blend of equal weight portion of FA and RB; or FA and BA and the improvementincreases with an increase in the replacement level. The corrosion resistances of FARB and FABA concretes were better than the CTconcrete or concrete with one pozzolan. The ternary blend is attractive as FA reduces the amount of the SP needed to maintain theworkability and the enhanced resistance to chloride penetration is also obtained from the synergic effect between the two pozzolans.

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