STANDARD RECOMMENDED PRACTICE FOR STABILIZATION …
Water soluble sulfate levels in soils should be identified in accordance with the modified version of AASHTO T 290 or equivalent test methods. Soils with sulfate levels above …
(PDF) QUALITATIVE EVALUATION OF FINE …
SO 3 in fine aggregate with 0.5% and for coarse aggregate with 0.1%. Most Iraqi fine aggregate used in concrete contain relatively high amount of sulphate, so it's
Influence of the sulphate content of recycled aggregates on …
In Fig. 10, the correlation between the water-soluble and acid-soluble sulphate contents is illustrated. ... Internal sulfate attack can be caused by the gypsum residues present in fine recycled aggregates (FRA). As opposed to the better known external sulfate attack or Delayed Ettringite Formation (DEF), the sulfates in this context …
Internal sulfate attack in mortars containing contaminated fine
In fine recycled aggregates (FRA), gypsum is an important contaminant to be considered: the water soluble sulfates coming from the gypsum particles strongly limit their valorization potential [6]. Sulfate attack is a deteriorating process where sulfates react with water and aluminate hydrates in a hardened cement paste to form secondary …
Concrete with EAF steel slag as aggregate: A
Acid-soluble sulphate and chloride, water-soluble sulphate, total sulphur, water solubility and free lime provided values under the detection limit. Carbonate content ranged between 0.1% (FS) and 4.3% (AS2); the higher value refers to the aged slag and is probably due to the ageing in an unprotected open area for several months that …
Aggregate Testing
Chloride (Acid -Soluble) BS 812, Part 117 Sulfate (Water-Soluble) BS 812, Part 118 Sulfate (Total or Acid-Soluble) BS 812, Part 118 Acid- soluble material in Fine Aggregates €BS 812, Part 118 Soundness of Aggregates - …
Determining Water-Soluble Sulfate Ion Content in Soil
1. SCOPE. 1.1. This test method covers the determination of the water-soluble sulfate ion content in soil. This standard is divided into two parts. The first part specifies the procedure for sampling and preparing the sample to size for testing. The second part delineates two test procedures (Methods A or B) for the determination of the sulfate ...
Construction Standard CS3:2013 – Aggregates for …
substances by mortar method. Specifies the property requirements, quality control requirements and testing methods of aggregates for use in production of concrete. Covers coarse and fine natural aggregates and coarse recycled aggregates having an oven-dried particle density not less than 2,000 kg/m3. Does not cover lightweight aggregates ...
Water-Soluble Sulfate in Soil
Scope*. 1.1 This test method is for the determination of water-soluble sulfate in soils. 1.2 This test method was developed for concentrations of water-soluble sulfate in soils between 0.02 and 3.33 % sulfate by mass. 1.3 This test method does not determine sulfur in any form except as sulfate.
Evaluation of Characteristics and Building Applications of …
Regarding the chemical properties of aggregates, for fine-size particles, the total amounts of sulphur (S%), acid-soluble sulphates (SO3s%) and water-soluble …
Standard Test Method for Acid-Soluble Chloride in Mortar …
Scope. 1.1 This test method 2 provides procedures for the sampling and analysis of hydraulic-cement mortar or concrete for chloride that is acid soluble under the conditions of test. In most cases, acid-soluble chloride is equivalent to total chloride. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as ...
(PDF) GRAVIMETRIC DETERMINATION OF SULPHATE IN …
0.5 g of anhydrous sodium sulphate was weight and put in 250 ml beaker, 20 ml of distilled water measured and poured and 20 ml of effluent was also measured and pour inside the same beaker.
II
A fine aggregate producing a colour darker than standard colour No 3 shall be considered to have failed this requirement. ... Water soluble chloride ASTM D1411)* ... of S1, S2, or S3 of CSA A23.1-14 Table 3 as appropriate. RCA used in unshrinkable fill to be placed in contact with sulphate-bearing soil or ground water with sulphate shall be ...
Use of fine recycled concrete aggregates in concrete: A …
The water-soluble sulfates were 0.08–0.24% and the total sulfur content was 0.35–0.62%. The Na 2 O eq was 0.46–1.5% for fRCA [ 85 ]. The crushing of concrete generates more adhered cement paste in fRCA, resulting in higher contents of soluble …
Expansion of concrete by secondary ettringite formation due to fine
Recycled aggregates, especially the fine (0–4 mm) fraction, are often contaminated with sulfates coming from gypsum residues on demolition sites. When these aggregates are used in concrete, the sulfates can induce internal sulfate attack which causes expansion of the concrete. European standard EN 206:2013 sets the water …
METHOD B17 T THE QUANTITATIVE DETERMINATION …
Water-soluble sulphates content of fine aggregates and of fines in aggregates for base-courses SECTION 1. REAGENTS NOTE: All water used shall be distilled or demineralized. 1.1 Bromine solution. A saturated solution of bromine in water. 1.2 Hydrochloric acid. Concentrated (relative density 1,16 at 20 E/20 EC). 1.3 Barium Chloride solution ...
ARAB COMPANY FOR LABORATORIES AND SOIL (ACES …
absorption of fine aggregate . ASTM C131/C131M Standard test method for resistance to degradation of small - size coarse aggregate by abrasion and impact in the Los ... Cl. 5.3 and 5.5 – Water soluble sulphate . BS 1377-3:1990 Methods of test for Soils for civil engineering Purposes, Part 3: Chemical and electro-chemical Tests, Cl. 6.0 ...
Acid-Soluble and Water-Soluble Chloride Testing …
A typical concrete mix may contain 700 kg/m3 of sand from 1800 kg/m3 of combined aggregates. The choice of testing laboratory can contribute a difference of 0.35 kg/m3 (0.05% x 700 kg) from the sand toward the limit of 0.8 kg/m3 for concrete which is clearly an unacceptable uncertainty derived from the testing method.
Materials | Free Full-Text | Valorization of Fine Recycled …
Fine recycled aggregates (FRA) (0/4 mm) are up to now not valorized on a high enough level because of characteristics like an elevated water absorption, higher …
Correlation analysis between sulphate content and
Soluble sulphates (from gypsum drywall) are a limiting factor in recycling of C&DW. Various samples were artificially prepared with different gypsum percentages. …
Aggregate Testing | Macquarie Geotech
RMS T219 Acid Soluble Sulphate Content in Road Construction Materials. RMS T235 Average Least Dimension of Aggregate. ... AS1141.5 Particle Density & Water Absorption of Fine Aggregate. AS1141.6.1 Particle Density and Water absorption of Coarse Aggregate (Weighing in Water Method) AS1141.11, 12, 13, 19 Particle Size Distribution …
Physical–chemical and mineralogical characterization of fine aggregates
For fine aggregates the maximum value accepted is 0.5% by mass. If the finishing of the concrete's surface is of special concern this limit is reduced to 0.25%. ... water soluble sulphate content, aggregates' solubility in water, humus content and total sulphur content. However, regardless of the mineralogical composition and the …
Laboratory Testing | Aggregate | Mattest
Polished Stone Value (PSV) – EN 1097-8. Ten Per Cent Fines – BS 812-111. Total Sulfur – EN 1744-1. Water Content – EN 1097-5. Water Soluble Sulfate – EN 1744-1. Water Soluble Chloride – EN 1744-1. See our accreditation schedules for a current list of INAB/UKAS accredited laboratory tests. Mattest offers a wide range of efficient and ...
AASHTO T 291
This standard is divided into two parts. The first part specifies the procedure for sampling and preparing the sample to size for testing. The second part delineates two test procedures (Methods A or B) for the determination of the water-soluble chloride ion content in soil. Two methods are given as follows:
Materials | Free Full-Text | Valorization of Fine Recycled Aggregates …
Fine recycled aggregates (FRA) (0/4 mm) are up to now not valorized on a high enough level because of characteristics like an elevated water absorption, higher fines content, and the presence of contaminations. Leftover gypsum residues from the construction site can cause internal sulfate attack when FRA are incorporated into new …
Use of fine recycled concrete aggregates in concrete: A …
The shape of fine aggregates is largely changed from round to angular after recycling of concrete rubble. In addition, the fRCA particles have different particle size distribution and specific surface areas compared to fine natural aggregates. ... In most studies, the water and acid soluble chloride and sulfate contents in fRCA were not …
Internal sulfate attack in mortars containing contaminated …
Abstract. Internal sulfate attack can be caused by the gypsum residues present in fine recycled aggregates (FRA). As opposed to the better known external …
Sulfate in concrete
Sulfate in concrete. Excessive amounts of mobile sulfate, derived from aggregates or other constituents in concrete, can cause disruption due to expansion. BS 8110 part 1 Structural use of concrete, 1985, had a limit of 4% by mass of cement based on the total acid soluble sulfate method expressed as SO 3 (clauses 6.2.5.3). This restriction was ...
An ACI Technical Publication
Aluminate phases in some supplementary cementitious materials (SCM), such as in some Class C fly ash10, or higher alumina content in slag cement11, can contribute to sulfate attack. Permeability of concrete – Water-soluble sulfates penetrate concrete by a combination of capillary sorption and diffusion. Concrete mixtures with a low w/cm and ...
(PDF) Determination of the water content of fillerised fine aggregates
alternative fine aggregate sources such as recy cled concrete fine aggregates (RCFA). 38 However, their use is still limited due to high WA values in the range 6-10 % [3,4].
Laboratory investigation of CDG soil as source of fine aggregates …
It is a composite material obtained by an appropriate proportioned mixture of coarse aggregate, fine aggregate, Portland cement, water, and other materials. ... The acid-soluble sulphate (SO 3) content (%) can be …
Thermogravimetric analysis (TGA) for characterization of self
Since fine aggregates, containing less original natural aggregates, are the principal cause of self-cementing properties [9] ... Water soluble sulfate content of RCA was measured in accordance with the European standard NF EN 1744-1. 1 kg of previously heated (60 °C) distilled water was added to 25 g of oven-dried fine aggregates (0-2 …
Influence of the sulphate content of recycled aggregates on …
Subsequently, the limit of the water-soluble sulphate content is fixed at 0.5% (expressed in SO 3). In this case, the limit is related to the medium-term liberation. ... Expansion of mortars with gypsum contaminated fine recycled aggregates. Constr Build Mater, 38 (2013), pp. 1211-1220. View PDF View article View in Scopus Google Scholar …
IS 14959-2 (2001): Method of Test determination of …
water. Unless otherwise specified, purechemicals of analytical reagentgradeanddistilled water(see IS 1070) shall be used in the test. 4.1.2 Nitric Acid( HN0 3) Concentrated ( Specific Gravity 1.42 ) 4 METHOD OF TEST Dissolve 5gofpotassium chromate in100mlofdistilled water. 4.1.5 Nitrobenzene (0°2 ) 4.1.6 Silver Nitrate (AgN03 ) …