000002181 001__ 2181
000002181 005__ 20141118153439.0
000002181 04107 $$acze
000002181 046__ $$k2013-05-27
000002181 100__ $$aHORIKOSHI, Naoki
000002181 24500 $$aPENETRATION RESISTANCE OF CHLORIDE ION OF ULTRA HIGH STRENGTH CONCRETE WITH ROOF TILE WASTE AGGREGATE

000002181 24630 $$n1.$$pProceedings of the First International Conference on Concrete Sustainability
000002181 260__ $$bJapan Concrete Institute, Tokyo
000002181 506__ $$arestricted
000002181 520__ $$2eng$$aUse of ultra high strength concrete (UHSC) is effective in improving durability of concrete structures which should lead to establishment of sustainable society. However, significant autogenous shrinkage develops in UHSC which results in higher risk of cracking. Authors reported that combination use of roof tile waste - coarse aggregate (PCCA) as an internal curing material, expansive additive (EX) and shrinkage reducing agent (SRA) is significantly effective in reducing autogenous shrinkage and resultant shrinkage stress as well as improving compressive strength of concrete. The present study aims at investigating the penetration of chloride ion into UHSC with water to binder ratio (W/B) of 0.15. The UHSC was made of low heat Portland cement premixed with silica fume by 10 %. In addition to conventional concrete (NC) with W/B of 0.35, three types of UHSC containing PCCA+EX+SRA, EX+SRA and no admixtures were prepared, in which coarse aggregate was replaced with PCCA by 20 % in volume. Non-steady penetration test was carried out by using the electrophoresis method and its result showed that the penetration rate of chloride ion of UHSC was 1/14 of NC and the diffusion coefficient of the former was 1/20 of the latter.

000002181 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000002181 653__ $$aultra high strength concrete, autogenous shrinkage, roof tile waste, Non-steady penetration test, chloride ion

000002181 7112_ $$aFirst International Conference on Concrete Sustainability$$cTokyo (JP)$$d2013-05-27 / 2013-05-29$$gICCS13
000002181 720__ $$aHORIKOSHI, Naoki$$iSATO, Ryoichi$$iADACHI, Kunihiko
000002181 8560_ $$ffischerc@itam.cas.cz
000002181 8564_ $$s1178269$$uhttp://invenio.itam.cas.cz/record/2181/files/S3-3-2.pdf$$y
             Original version of the author's contribution as presented on CD, .
            
000002181 962__ $$r2053
000002181 980__ $$aPAPER