sodium sulfate cement

Archived Portland Cement Concrete Testing Manual

PORTLAND CEMENT CONCRETE TESTING MANUAL PERFORMANCE QUALITY Department of itansportation ... taken at the concrete plant and are tested by the ... Sodium sulfate and magnesium sulfate test results are reported as percent loss.

Effect of Sulfates on Cement and LimeStabilized Soils

Effect of Sulfates on Cement and LimeStabilized Soils P. T. SHERWCX)D, Road Research Laboratory, Department of Scientific and Industrial ... the high pH values encountered in cement and limestabilized soils, a reaction occurs between ... small proportions of sodium sulfate to increase the strength of some cementstabilized

Sodium Sulfate Resistance of Mortars Containing Combined ...

Sodium Sulfate Resistance of Mortars Containing Combined Nanosilica and Microsilica ... (nS) and microsilica (mS) on sulfate resistance of portland cement mortars was compared with cementonly control mortars and mixtures with equivalent contents of only one form of silica. Silicacontained mortars had 6% cement replacement of either nS, mS, or ...

Concrete Additives Clariant Ltd.

Our concrete additives are used to reduce the cost of concrete construction, to optimize concrete properties and to ensure a consistent quality of concrete. ... Genapol LRO liquid is a sodium lauryl ether sulfate which is a strong foaming agent and unsusceptible to water hardness. it is also a wetting agent and adjuvant used in crop protection ...

Assessment of Key Properties of Solidified Fly Ash with ...

using sodium sulfate salt in conjunction with Portland cement. Performance measures included unconfined compressive strength (UCS) and hydraulic conductivity. The results indicate that improved geotechnical performance can be achieved when sodium sulfate salt is a component of

Sodium Sulphate Effect on Cement Produced with Building ...

The resistance of concrete to sulphate attack is determined by several factors, such as water/cement, The main idea of using different wastes such as byproduct permeability, and cement properties, which include fineness or natural was not only the cost effectiveness but also and cement composition [4]. the improvement of the properties of ...

Chemical Sulfate Attack on Concrete | Civil Engineering Forum

Sulfate attack on concrete. Sulfate compounds (such as calcium sulfate, sodium sulfate, and magnesium sulfate) which exist in seawater, ground water, sewers, soil or even in the concrete materials themselves can attack and significantly damage the concrete.

Sulfate Attack and Sulfate Content in Concrete: A ...

Internal sulfate attack occurs when a source of sulfate is incorporated in the concrete when mixing like excess gypsum in cement, sulfate in the aggregate, water or admixture, and contamination.

Mechanical properties of cement mortar in sodium sulfate ...

To investigate the mechanical properties of cement mortar in sodium sulfate and sodium chloride solutions, uniaxial compression test and ultrasonic test were performed. Test results show that the relative dynamic elastic modulus, the mass variation, and the compressive strength of cement mortar increase first, and then decrease with increasing ...

Combined effect of sodium sulphate and superplasticizer on ...

Materials Research Print version ISSN 15161439 ... Combined effect of sodium sulphate and superplasticizer on the hydration of fly ash blended Portland ... Goñi S and Guerrero A. Activation of pozzolanic reaction of hydrated portland cement fly ash pastes in sulfate solution.

Sodium sulfate | Na2SO4 PubChem

Sodium Sulfate Anhydrous is the anhydrous, sodium salt form of sulfuric sulfate anhydrous disassociates in water to provide sodium ions and sulfate ions. Sodium ion is the principal cation of the extracellular fluid and plays a large part in the therapy of fluid and electrolyte disturbances. Sodium sulfate anhydrous is an electrolyte replenisher and is used in isosmotic solutions ...

Sodium Sulfate Resistance of FastTrack Portland Cement ...

The research study presented herein is intended to examine the sodium sulfate resistance of early openingtotraffic portland cement concrete. The trial matrixes of two categories of openingtotraffic times, four cement factors, and three cement types are exposed to very severe external sodium sulfate attack based on ASTM C 1012.

sodium sulfate and Fly ash in cement production Page 1 of 1

sodium sulfate and Fly ash in cement production. Have heard that addition of sodium sulfate could improve the performance of cement using flyash. can some one share any experiences if …

Sodium sulfate attack on plain and blended cements ...

Once, the chemical composition of the cement, amount of cement being replaced with the mineral admixture and the concentration of sodium sulfate solution to which the system will be exposed is known, the 15week expansion values, as specified by ASTM C1012 test method, can be estimated by using the proposed equation.

The Impact of AluminumContaining Set Accelerators on ...

This study contains comparative research of sulfate resistance of ordinary Portland cement pastes with addition of basic aluminum sulfate (hydroxosulfate, Al(OH) (SO 4) ) and amorphous Al(OH) 3 months of storing in sodium sulfate solution, the most significant expansion and deterioration occur in case of samples with aluminum hydroxide.

Sulfate Resistance of Concrete Using Blended Cements or ...

Sulfate Resistance of Concrete Using Blended Cements or Supplementary Cementitious Materials By Javed I. Bhatty and Peter C. Taylor* BACKGROUND The degradation of cementitious materials due to sulfate attack has been recognized since before the advent of portland cement (Bellport 1993). In the mid18th century, Smeaton of Great Britain

Sulfate attack in concrete and mortar Wikipedia

Sulfate attack in concrete and mortar can be 'external' or 'internal'. External: due to penetration of sulfates in solution, in groundwater for example, into the concrete from outside. ... The above effects are typical of attack by solutions of sodium sulfate or potassium sulfate. Solutions containing magnesium sulfate are generally more ...

Applications for Sodium Bisulfate: The Dry Acid Jones ...

pHase™ Food Grade Sodium Acid Sulfate; Potassium Acid Sulfate (KAS) ... Concrete Wash Out. Reduces alkalinity in “wash out” ponds formed by concrete truck clean out. Area concrete companies are potential distributor customers. ... Industries Using Sodium Bisulfate (SBS) Chemical Distributors Metal Treating Swimming Pool ...

TYPES OF SULPHATE ATTACK IN CONCRETE The Constructor

TYPES OF SULPHATE ATTACK IN CONCRETE. ... The above effects are typical of attack by solutions of sodium sulfate or potassium sulfate. Solutions containing magnesium sulfate are generally more aggressive, for the same concentration. ... it can occur at normal levels of cement sulfate. A key point in understanding DEF is that ettringite is ...

use of sodium sulphate in cement production Page 1 of 1

Sep 12, 2009· The sulphate content of cement is limited by international standards. The alkali content is limited if the aggregates to be used in concrete production contain reactive silicates. These will determine the limits of any sodium sulphate addition.

Sodium silicate Wikipedia

Sodium silicates are colorless glassy or crystalline solids, or white powders. ... The material can be obtained also from sodium sulfate (melting point 884 °C) with carbon as a reducing agent: ... The largest application of sodium silicate solutions is a cement for producing cardboard.

Sulfate attack in concrete Understanding Cement

The use of sodium sulfate as a concrete admixture, in amounts ranging from two to five percent by mass of cement, resulted in improved sulfate resistance for concrete containing Class C fly ash. In many cases, sulfate resistance exceeded that of Type II cement concrete without fly ash.

Effects of Substances on Concrete and Guide to Protective ...

Cement content—at least 335 kg/m3 (564 lb/yd3) of cemen titious material should be used for concrete exposed to severe freezethaw, deicer, and sulfate environments. Suitable cement type—cement should be suited to the exposure, such as sulfateresistant cement to help prevent sulfate …

Evaluation of Sulfate Resistance of Portland Cement ...

Evaluation of Sulfate Resistance of Portland Cement Mortars Containing LowCarbon Rice Husk Ash ... or Type V cement (high sulfate resistance). In situations in which ... in 5% sodium sulfate and 5% magnesium sulfate solutions separately. In order to compare the sulfate resistance of mortars

Sulfate Soundness Test Pavement Interactive

Immerse the sample in a saturated solution of sodium or magnesium sulfate and let it remain at a constant temperature for 18 hours. Remove the sample from the solution and dry to a constant weight at 110 ± 5 o C (230 ± 9 o F). Repeat this cycle five times. Wash the sample to remove the salt; then dry.

Sodium Sulphate Effect on Cement Produced with Building ...

In this study, the blended cements produced by using the building stone waste were exposed to sulphate solution and the cement properties were examined. Prepared mortar specimens were cured under water for 28 days and then they were exposed to three different proportions of sodium sulphate …

Chemical Resistance Chart for Concrete

Chemical Resistance Chart for Concrete Ambient temperature and maximum concentration apply, unless otherwise noted. Page 1 of 6 ... Sodium Sulfate (dry) [Na2SO4] 1 1 1 1 1 Sodium Sulfite (dry) [Na2SO3] 1 1 1 1 1 Stannic Chloride (dry) [SnCl4] 1 1 1 1 1 Starch [C6H12O6]n 1 1 1 1 1

Sulfate Resistance of Concrete: A New Approach

• Concrete properties: absorption and diffusion of sulfate (resistance to the ingress of sulfate solutions). • Cement paste properties: chemical reaction between the hydration product and the sulfate ions. In the literature this is referred as chemical attack [2].

Durability

Resistance to Sulfate Attack: High amounts of sulfates in soil or water can attack and destroy a concrete that is not properly designed. Sulfates (for example calcium sulfate, sodium sulfate, and magnesium sulfate) can attack concrete by reacting with hydrated compounds in the hardened cement paste.

Relationship of the garnethydrogarnet series to the ...

converted by sodium sulfate solutions to Partial ... There are a number of methods by whlCh the sulfate resistance of portland cement mortar or concrete can be increased, including the following: (1) Steaming the mortar or concrete [2].

Influence of Calcium Sulphate on Cement Motor and ...

presence of impurities affects significantly the properties of the concrete. In this investigation, magnesium sulphate, sodium sulphate and sodium sulphide were used in various proportions for the preparation of salty solutions. Portland cement pastes and mortars were produced by using these solutions as mixing water.

how salt damages concrete | CRETEDEFENDER

Concrete is exposed to sulfates in two ways, externally sourced and internally sourced. Most commonly, sulfate attack occurs where concrete is exposed to high sulfate content in the soil, in areas of runoff, and in wastewater. Secondly, portland cement contains a small percentage of gypsum (calcium sulfate …

ASTM C88 / C88M 18 Standard Test Method for Soundness of ...

C88 / C88M18 Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate soundness~ ... This test method provides a procedure for making a preliminary estimate of the soundness of aggregates for use in concrete ... This is accomplished by repeated immersion in saturated solutions of sodium or magnesium ...