Assessment of concrete cover quality is necessary for proper maintenance of concrete structures concrete durability is evaluated primarily based on chloride penetrability, neutralization and other external factors the present study attempts to analyze concrete quality and its mass transfer resistance performance by measuring the air permeability and its relation with concrete. Concrete durability has been defined by the american concrete institute as its resistance to weathering action, chemical attack, abrasion and other degrada. Effect of mineral admixtures on durability properties of high performance concrete asmakc, meeracm, preetha prabhakaran pg student, email: [email protected] assistant professor, email: [email protected] associate professor, email:[email protected] department of civil engineering, sree narayana gurukulam college of engineering, kerala, india abstract concrete. Evaluation of rapid determination of the chloride permeability of portland cement concrete by aashto t 277-83 project no mlr-86-11 by j l nash office of materials. Acid resistance and rapid chloride permeability of high performance concrete m verapathran and p murthia department of civil engineering, cms college of engineering & technology, coimbatore – 641032 (tn) india akathir college of engineering, coimbatore – 641062 (tn) india. Twenty-year performance of latex-modified concrete overlays michael m sprinkel fourteen bridge decks with latex-modified concrete (lmc) over lays ranging in age from 2 to 20 years and two overlays without latex were studied, and their general condition was found to be good the half-cell and chloride data indicate that the. Chloride ingress resistant concrete: high performance concrete containing supplementary composites carbonation, alkali-aggregate reaction and corrosion of steel reinforcement, as a result of reaction between an external agent and the ingredients of concrete, and some physical effects, such as frost attack, can be greatly reduced by reducing the permeability of concrete.
The chloride ion permeability test as per astm c 1202 on various hpc mixes to measure the permeability values of hpc produced with metakaolin their experimental results indicate that metakaolin has the ability to reduce the permeability of high performance concrete considerably the authors concluded that chloride ion permeability. A partnership of the virginia department of transportation and the university of virginia since 1948 3/4/2010 1 vdot’s new high performance concrete specifications celik ozyildirim, phd, pe. Surface resistivity test evaluation as an indicator of the chloride permeability of concrete pdf version (267 kb) pdf files can be viewed with the acrobat® reader. Ijacear– an open access journal international journal of advanced civil engineering and architecture research 55 table 1: concrete mix designs: materials used in concrete materials (note that small correcting adjustments to the sand content were made to accommodate the different densities of na and rca.
Moving to performance specifications for concrete michael f praul, pe senior concrete engineer fhwa office of asset management, pavements, and construction quality in the concrete paving process performance specifications performance specifications are different from prescriptive specifications performance. Chloride permeability of damaged high-performance fiber-reinforced cement composite by repeated loads to the specimens and found that the chloride permeability of concrete increased at an increasing rate with its residual strain djerbi et al [16,17] investigated the influence of transverse cracks and compressive loading on chloride diffusion with ordinary or high strength concrete.
Technical report standard title page 1 report no sd2002-02 2 government accession no 3 recipient's catalog no 4 title and subtitle optimized aggregate gradation for structural concrete. An engineer may employ several different methods to prevent or remedy corrosion induced by chloride intrusion the simplest way to reduce corrosion is to increase the cover over rebar adding just an extra inch of concrete cover could double the life of a structure another way to prevent chloride.
Effect of cement type on the resistance of concrete against rapid chloride permeability tolga ilıca 1 hasan yıldırım 2 özkan ş engül 3 t11 abstract in chloride containing environment, chloride permeability of concrete is a very important quality parameter affecting the service life of concrete structures the.
The purpose of this form is to estimate the results of a rapid chloride permeability test (astm c1202) for a concrete mixture for a user-specified concrete mixture, an estimate of the concrete's formation factor is obtained from an equation developed previously the equation was developed with data. Diamondcrete provides you with a high performance ready-mixed concrete, securing fast track solutions to many of the more challenging aspects of construction. Chloride penetration resistance, permeability resistance and abrasion resistance performance of prepared concrete reinforced with pan fiber were researched the pan fiber volume concentration percentages of cement were 0, 05%, 10%, 15% and 20% by cement, respectively finally, mip was used to characterize the pore parameters of pan fiber reinforced concrete.