Comparative study of procedures for the analysis of chloride in harden concrete

by G. G. ClemenМѓa

Publisher: Dept. of Transportation, Federal Highway Administration, Office of Research, Publisher: for sale by the National Technical Information Service in Washington, Springfield, Va

Written in English
Published: Pages: 51 Downloads: 38
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Subjects:

  • Concrete -- Research -- United States.,
  • Chlorides.

Edition Notes

StatementG. G. Clemena, J. W. Reynolds, and R. M. McCormick.
SeriesReport - Federal Highway Administration ; no. FHWA-RD-77-84
ContributionsReynolds, John W., 1941-, McCormick, Randy., United States. Federal Highway Administration. Office of Research., Virginia Highway & Transportation Research Council.
The Physical Object
Pagination51 p. in various pagings :
Number of Pages51
ID Numbers
Open LibraryOL15216169M

Evaluation and Assessment of Concrete Produced by Utilizing of Treated absorption, and voids in hardened concrete, whereas rapid chloride permeability testing were carried out as per ASTM C Standard test method for electrical indication of concrete’s ability to resist chloride age, concrete type, and the curing procedure, thus. Durability and service life of concrete structures can be endangered by chloride ions. Two phenomena help to keep control of chloride effects. On one hand cements are able to bind chloride ions by their aluminate clinker phases or by the clinker substituting materials. On the other hand resistivity of concrete against chloride penetration can be improved by careful selection of concrete Cited by: 2. For the September sampling event, the analysis did not include Hg because the sample holding time was exceeded. The contract laboratory performed the analysis in accordance with the EPA Methods A for ICP-MS and for ICP-OES. Both total and dissolved metals were analyzed. Cement Standards and Concrete Standards ASTM's cement and concrete standards are instrumental in the evaluation and testing of concrete, cement, and aggregates. Concrete can have different properties depending upon the mixture that is used in creating it, which contains cement, chemical admixtures, and .

Rapid chloride test method is also known as RCT method and it is one of the most important and quick methods for testing of acid soluble chloride in concrete. On the field chloride content test for concrete includes the use of the chloride ion sensitive electrode. This also known as Rapid Chloride test Kit The ability of cement concrete to resist weathering action,chemical attack and any process that can deteriorate its condition is known as durablity of concrete that retains its original form,quality & serviceablity inspite of any kind.   Therefore, the rate of chloride ion penetration of concrete structures is of interest to corrosion engineers. This paper reports the results of a laboratory investigation into the rate of seawater chloride penetration of various hardened concrete mixes with and without impressed current by: A two-stage mixing process for concrete involves mixing a slurry of cementitious materials and water, then adding the slurry to coarse and fine aggregate to form concrete. Some research has indicated that this process might facilitate dispersion of cementitious materials and improve cement hydration, the characteristics of the interfacial transition zone (ITZ) between aggregate and paste, and.

Chemical, Concrete Chloride Analysis Mass [Weight] of Coating on Aluminum-Coated Iron or Steel Articles Mass [Weight] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings Procedure for Chloride Determination Determination of Organic Matter in Soils by Wet Combustion Portland-Cement Content of Hardened Hydraulic-Cement Concrete. Concrete that is sloppy or wet may be easy to place but will be more difficult to finish. A worker leaves footprints in setting concrete. Hardening State After concrete has set it begins to gain strength and properties of hardened concrete are strength and durability. Hardened concrete will have no footprints on it if walked Size: KB.   In the present study, the use of electrical resistance measurements to estimate the water cementitious ratio and chloride ion diffusivity in terms of water cementitious ratio, compressive strength of concrete is explored. Both hardened and plastic concretes were studied, over a wide range of water/cementitious by: 5. Steel-reinforced concrete is used ubiquitously as a building material due to its unique combination of the high compressive strength of concrete and the high tensile strength of steel. Therefore, reinforced concrete is an ideal composite material that is used for a wide range of applications in structural engineering such as buildings, bridges, tunnels, harbor quays, foundations, tanks and pipes.

Comparative study of procedures for the analysis of chloride in harden concrete by G. G. ClemenМѓa Download PDF EPUB FB2

Comparative study of procedures for the analysis of chloride in hardened concrete. Washington: Dept. of Transportation, Federal Highway Administration, Offices of Research and Development ; Springfield, Va.: For sale by the National Technical Information Service.

COMPARATIVE STUDY OF PROCEDURES FOR THE ANALYSIS OF CHLORIDE IN HARDENED CONCRETE. In the widely used potentiometric titration procedure for the analysis of chloride in powdered hardened concrete samples, difficulties have Cited by: 1.

Comparative study of procedures for the analysis of chloride in harden concrete / By G. (Gerardo G.) Clemeña, joint author. Randy McCormick, joint author. John W. Reynolds, Virginia Highway & Transportation Research Council.

and United States. Federal Highway Administration. In the widely used potentiometric titration procedure for the analysis of chloride in powdered hardened concrete samples, difficulties have often been encountered when determining the endpoint.

These difficulties have been eliminated through the use of the Gran method of endpoint determination, which also simplifies the titrations and improves the overall precision of the by: 1.

Comparative Study of Procedures for the Analysis of Chloride in Hardened Concrete. Virginia Highway and Transportation Research Council, Rept. VHTRC R7, July Publication of this paper sponsored by Committee on Performance of Concrete-Physical Aspects.

Comparative Study of Procedures for the Analysis of Chloride in Hardened Concrete; Report No. FHWA-RD; Federal Highway Administration: (). Condition Evaluation of Concrete Bridges Relative to Reinforcement Corrosion. Equipment for chloride analysis according to applied test method.

Slide caliper, accuracy better than ± mm. Preparation of test samples From each of the concrete cones or concrete cylinders, the parts and specified below are cut off by means of a water-cooled diamond saw.

Test specimen for exposure in NaCl solution. Analysis of hardened concrete for chloride ion content. PURPOSE This project was undertaken to improve laboratory testing procedures for chloride ion content in concrete in terms of time and work required and quality of results obtained.

BACKGROUND The determination of chloride ion content in concrete has been performed. comparative study chloride migration in concrete has been studied by mean s of three different test methods.

Results of the rapid chloride migrat ion (RCM) test, the alternating current test, and. Therefore, reliable chloride analysis in hardened concrete becomes a key parameter in the evaluation of existing structures and in the prediction of future service life.

The present recommendation is the result of a Round-Robin Test on chloride analysis in concrete, car-ried out by the Technical Committee TC TMC. A Analysis of total File Size: 99KB. This paper reports a laboratory-based study carried out to compare the performance of various proprietary concrete protection systems, designed to reduce chloride ingress and reinforcement corrosion.

These include: controlled permeability formwork (CPF), a silane/siloxane hydrophobic surface treatment (S/S), an integral liquid waterproofing admixture (WP) and a corrosion-inhibiting chemical Cited by: COMPARATIVE STUDY OF PROCEDURES FOR. THE ANALYSIS OF CHLORIDE IN HARDENED CONCRETE by Gerardo G.

ClemeHa Research Analyst John W. Reynolds Chemist and Randy McCormick Student He iper Virginia Highway & Transportation Research Council (A Cooperative Organization Sponsored Jointly by the Virginia Department of Highways & Transportation and the.

MATERIALS AND METHODS the properties of hardened concrete. coarse aggregate is taken kg/m the water to binder ratio was kept constant asthe Super plasticizer content was varied to Comparative Study of Effect Sodium Chloride and Sulphuric Acid on Curing of Concrete with Partial Replacement of Cement by RHA and Fly Ash Author: S.H.

Sathwane, O.V. Sapate, R.A Bondre. Hardened Concrete Hardened concrete is a product of binding and hardening of the concrete mixture which contains ingredients quantified in the appropriate proportions: binder (cement), coarse aggregate (gravel), fine aggregate (sand, fraction 2mm), water and optional additives (> 5% by weight of binder) and admixtures (5% by weight of the binder).

The comparative study showed that zeolite has a pozzolanic effect on cement concrete. The pore size distribution of neat hardened cement paste (hcp) and hcp with zeolite, PFA and silica fume at W /(C + P)= was determined by means of mercury intrusion porosimetry and the results are shown in Cited by:   In Part I of this paper, general trends in the realisation of this Round Robin Test on chloride analysis in concrete (carried out as part of the work developed by the Technical Committee TC TMC), as well as the results corresponding to total chlorides were given.

The present paper reports the results corresponding to the extraction of water soluble by: forwarded to a NATA accredited laboratory for chloride content analysis. Each core was cut into four depth increments; mm, mm, mm, mm, and the chloride content measured in accordance with BS Part “Methods for Analysis of Hardened Concrete” Section except titration by potentiometric method.

Comparative Study of Procedures for the Analysis of Chloride in Hardened Concrete In the widely used potentiometric titration procedure for the analysis of chloride in powdered hardened concrete samples, difficulties have often been encountered when determining the endpoint.

potentiometric titration procedure was evaluated by comparison. ecent articles in Concrete(1) demonstrate that the chemical analysis of hardened concrete, and particularly the determination of chloride content, is a procedure that requires great care to ensure sensible results are obtained. Round-robin test results For laboratory-prepared specimens with a target chloride content below % by mass of.

Comparative Study of the Characteristics of Nano Silica–, concrete, particularly that containing Class F fly ash, is slow and a chloride ion content of less than %.

The chemical compositions of OPC, NS, SF and FA reported by the suppliers are given in Table 1. from concrete-making materials when concrete is produced. The scope of this study is on the internal chlorides in concrete.

The ACI Building Code Requirements for Structural Concrete establishes limits on water-soluble chloride ions in concrete mixtures used for reinforced and prestressed concrete File Size: KB.

A Comparative Study of the Methods of Concrete Mix Design Using Crushed and Uncrushed Coarse Aggregates. T.C. Nwofor, S. Sule and D.B. Eme. Department of Civil Engineering, University of Port Harcourt, P.M.B Port Harcourt, Rivers State, Nigeria.

Hardened Concrete Analysis Chemical analysis of hardened concrete can provide a wealth of information about the mix constituents and possible causes of deterioration. Standard methods can be used to find the cement content and original water/cement ratio, but.

The impact of calcium chloride admixture on the compressive strength of concrete made from these brands of cement was compared with the compressive strength of concrete without calcium chloride. Sieve analysis, natural moisture content and specific gravity tests were carried out on the aggregates used in the production of the concrete and the.

This book examines the corrosion of reinforced concrete from a practical point of view, highlights protective design and repair procedures, and presents ongoing maintenance : Mohamed Elreedy. This study was conducted to investigate the impact of hot and dry environments under different curing conditions on the properties of high-strength concrete.

The concrete samples were prepared at a room temperature of 20°C and cured under different curing conditions. Some specimens underwent standard curing from 24 h after casting until the day of by: 1. The methods are updated and expanded revisions of the earlier procedure developed by FHWA and contained in report FHWA-RD, "Determination of Chloride in Hardened Portland Cement Paste, Mortar and Concrete" by H.

Berman and report FHWA-RD, "Evaluation of Portland Cement Concrete for Permanent Bridge Deck Repair.". analysis (extraction and quantification) of water soluble chloride in hardened concrete based on the extraction with distilled water.

DEFINITIONS Total chloride content:Is the total amount of chloride ion in a sample of concrete, including bound in the solid phases and free chlorides in the pore solution.

Free chloride content:Is the amount. IR Sampling Concrete for Chloride Analysis IT Total Chloride Content of Hardened Concrete by Gran Plot Method IR Determination of the Rate of Evaporation of Surface Moisture from Concrete IR Field Sampling of Hydraulic Cement and Fly Ash IT Measuring Texture Depth of Portland Cement Concrete Using a Tire Tread.

Types and Causes of Concrete Deterioration Reinforced concrete exposed to chloride in service Reinforced concrete that will be dry or protected from moisture in service Other reinforced concrete construction *Water-soluble chloride, percent by weight of cement.

Chloride testing is mainly carried out on reinforced concrete using test methods given in BS Chloride can be present in the concrete either as added calcium chloride used to accelerate the setting time of the concrete or as a contaminant of the aggregate.This report presents recommended methods for sampling and testing for both total and water-soluble chloride ion in hardened concrete.

The methods are updated and expanded revisions of the earlier procedure developed by FHWA.The Combining of Sodium Chloride and Calcium Chloride by a Number of Different Hardened Cement Pastes, Cement and Concrete Research, Vol. 8,Goto, S., and Roy, D.M., Diffusion of Ions Through Hardened Cement Pastes, Cement and Concrete Research, Vol.

11,