Construction Chem-67

Retarder Cement Admixture

WATER Reducing Super Plasticiser

Retarders keep concrete workable during placement and delay the initial set of concrete.

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Key details

Generic name	WATER Reducing Super Plasticiser
Active matter (%)	68 - 72
Standard packing	220.00 Kg.Liq
Available pack sizes	25, 60, 220 Kg liquid drum.
Supply locations	Retarder Cement Admixture manufacturer distributor in Mumbai Kandla Chennai Kolkata Visakhapatnam INDIA. Get premium quality of Cement Retarder Admixture from Retarder manufacturer supplier in Dubai Sharjah Ajman Fujairah Abu Dhabi Ras Al Khaimah Muscat Barka Salalah Sohar OMAN.

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Application

RXSOL-67-6706-220 used as concrete retarder, water reducing agent. Specifically developed by use in high quality concrete for workability retention at low water content. Also sodium gluconate as a retarders keep concrete workable during placement and delay the initial set of concrete. This is an additional admixture which uses in mortar/concrete to Provides good pumpable concrete.

These admixtures slow down the hydration process. They may also reduce the setting time of cement. Retarding admixtures fall into two categories: regular and extended-set. Regular, most commonly referred to as just “retarders,” are used to place concrete in hot climates when long travel times are expected or, in cases of emergency, when placement is delayed. They are also commonly used for mass concrete pours to prevent cold joints.

Extended-set control admixtures are those used to delay hydration for many hours or even days. These are usually two-component admixture systems. The first component is a retarder (stabilizer) which delays the setting of concrete.

The second component is an accelerator (activator) which overcomes the retarder. The concrete typically reaches the initial set in a few hours after the activator is applied. In the precast industry, retarding admixtures are also used as surface retarders. Surface retarders are used in making exposed aggregate architectural precast. They are typically sprayed or rolled onto the forms. The concrete is then cast into the forms. The next day, the retarded cement is water blasted or brushed off the concrete’s surface, producing an exposed aggregate finish.

Using Procedure

Best dose rate can be determined in trial batch mixes. While In normal concrete a dosage of between 0.7-2.0 litre for 100kg. total cementitious material. In a high performance, low water cement ratio concrete, a dosage of between 1.5-3.5 litre / 100kg total cementitious material to to improve strengths. The addition of the admixture will allow the removal of water from the mix whilst maintaining workability.

Higher dosage of WATER Reducing Super Plasticiser without causing any adverse effects upon the concrete. RXSOL-67-6706-220 Cement retarder is a chloride free. Superplasticising admixture based on selected polymer modified naphthalene sulphonate dispersives. RXSOL-67-6706-220 Cement retarder disperses by electro kinetic action in the concrete mix. Enable the water phase of the concrete to perform more effectively.

After initial trials. Minor modifications to the overall mix design may be made to optimize performance.

Note : Initial trials should be made with normal concrete mix designs. The use of a combination of admixtures in the same concrete mix and or cement replacement may alter the setting time. Trials should always be conducted to determine such setting times. Never mix RXSOL-67-6706-220 Cement retarder directly to cement the admixture should be added to the concrete with the mixing water.

Overdose : Always take batch trial before uses of cement retarder. High dose will increase retardation effect and more curing required, How ever this may reduce the strength of concrete. But overdosing can be done if sulphate resisting cement or cement replacement materials are used.

Technical Specifications

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Appearance
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Brown liquid
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Odour / Solubility
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Characteristic / INFINITE IN WATER.
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Density
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>1.15 at 25°C +/- 0.05
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Chloride content
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Nil to BS 5075 Part 1, Chloride free. Safe for use in precast prestressed and reinforced concrete. ( As per BS 5075/ BS:EN 934 )
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Freezing Point: </td>
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Approximately -2 degree C.</td>
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Freezing point:

Flashpoint:
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0°C

N/A , Fire RXSOL-67-6706-220 is water based and non-flammable.
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Storage</td>
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12 Month. Always stir well before use. And storage heating range will be 2 degree C to 50 degree C.
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Air Entrainment : Less than 2% additional air is entrained at normal dosages.</div>
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Remarks

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Advantages of using RXSOL Cement Retarder Admixture:</h4>
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Retarding admixtures extend the setting time of concrete and maintain the workability and cohesion for extended period of time</li>
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In the large construction projects, concrete retarder prevents cold joints formation in successive lifts and make concrete workable throughout the concrete placing</li>
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With the use of concrete retarders, you can compensate for the accelerating effect of high temperature towards the initial setting time and minimise risks of long-distance delivery in hot weather.</li>
<li>
Use of retarding admixtures improves pumpability of concrete by delayed setting period and improved workability of concrete.</li>
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Concrete retarders help to reduce segregation and bleeding in concrete in which poor sand grading is unavoidable.</li>
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It improves the workability of concrete.</li>
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The appearance of the concrete is greatly improved.</li>
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Drying shrinkage and creep rate are also increased.</li>
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Good control of water content and setting time helps concrete to gain full strength and power. Our WATER Reducing Super Plasticiser RXSOL-67-6706-220 is absolutely free from CHLORIDE content. 
 
Proper doses of WATER Reducing Super Plasticiser RXSOL-67-6706-220 ensures that workable in excess 3 hours at +20°C. Workability loss is dependent on temperature, and on the type of cement, the nature of aggregates, the method of transport and initial workability. 
 
Concrete should be properly cured particularly in hot and dry climates. 

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WATER Reducing Super Plasticiser RXSOL-67-6706-220 High range water reducing property allows the production of high quality concrete without excessive cement contents- ensures improved durability. 
 

Stock and disposal control :::

Super Plasticiser RXSOL-67-6706-220 leakage and spilage can be controlled by absorbent saw dust and excess materials can be shift to other suitable container. And after stripping and absorption area can be flushed with water.
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Note

Increasing the setting time of cement helps High workability for longer periods and if cocrete is going to pump for high rise presence of RXSOL-67-6706-220 in cement Lower pumping pressure also. 

WATER Reducing Super Plasticiser RXSOL-67-6706-220 Reduced thermal peaks, Acts as a highly effective hydration control admixture especially in blended concrete. 
Delayed setting with longer workability, Higher workability levels are maintained for longer than with sulphonated and naphthalene admixture. 
Higher ultimate strengths, Better rheological properties for concrete made with double or triple blends without abnormal retardation. 

Improved durability and Improved cohesion and particle dispersion minimizes segregation and bleeding and improves pumpability by reducing permeability. 

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WATER Reducing Super Plasticiser RXSOL-67-6706-220 is compatible with all types of Portland cements and cement replacement materials such as PFA GGBFS and microsilica.</div>

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