bonding agent for concrete

Company InformationCHINA OVERSEAS SCIENCE & TRADE CO.,LTD(referred as COSTCO) is a science, industrial enterprise registered in Beijing, 2003. It is a member of China Construction Structure Association and China Concrete Admixture Association. We already successfully obtained the dangerous chemicals license issued by the Beijing Municipal Government as well as exclusive import-export rights issu ed by the Chinese Ministry of Commerce, the independent customs inspection issued by the China Entry-Exit Inspection and Quarantine.

FAQ

Notice

1. About the payment

We would like to use the T/T OR L/C at sight.

2.Sample Freight

We can offer the free sample to our buyer, but they need to chage for the freight. Once we sign the contract, we will cut this from the order. Hope you can understand.

3. Product Specification

According to the different content of Na2SO4, the SNF quality is different.

Product Description

SNF-5A Sodium Naphthalene Sulfonate Formaldehyde Concrete Agent has the characteristics of retarding, super-plasticized, water-reducing, less loss of slump. It is very effective concrete admixture to adopt in high temperature area.

Main Properties and Characteristics

1 .Excellent effect of retarding: It can be used in retarding the setting of concrete for 2 hours to 36hours, and initial setting and ultimate hardening almost happen at the same time, so that it’s convenient for conveying at long distance.

2 .With the water-reducing rate of 15%-25%, it can improve the flowability, permeation-proofing ability, and the workability of concrete, concrete compression resistant, and other physical mechanics will be also gained.

3 .Reduces cement dosage by 15%-25% without altering compression strength and slump.

4. Good for many applications: Portland cement, ordinary Portland cement, Portland fly-ash cement, Portland pozzolana cement and Portland blast furnace-slag cement. retarder concrete admixture

Standards

SNF-5A has been formulated to comply with BS5075 for high range water-reducing admixtures,GB8076-1997, ASTM C494 and Chinese Standard’s Cement(P.O.42.5).

Typical performance

SNF-5A improves initial and ultimate strengths. It also gets less loss of slump and improves

workability of the concrete more than traditional superplasticizer. The lower content of Na2SO4, in the admixture, will lead to meet the requirement of the special cement concrete engineering project in the coastland and high saline-alkali area.

Technical Data

Item	SNF-5A	SNF-5
Supply form	Powder	Powder
Color	Brown	Brown
Addition Rate (%)	0.4-1.5	0.4-1.5
Solid Content (%)	-----	-----
Water Content (%)	≤6	≤6
Fineness (30meshes sieve %)	<5	<5
Density(g/m, 20°C)	-----	-----
PH(Value Solution 5%)	8.0±1.0	8.0±1.0
Cl Content (%)	<1	<1
Na2SO4 Content (%)	<3	<15
Flowability for Cement Net Mortar(cm)	>23	>22
Corrosion Effect to Steel	No	No

Application Method

1. SNF-5A is applying steel reinforcement concrete and in the condition of normal temperature. 2. SNF-5A is applying prestressed concrete in the condition of normal temperature

3. It can get good quality flowable plasticizied concrete , retarder concrete admixture

4. It can get less loss of slump, high strength, high flexible modulus, excellent permeation-proofing ability, low shrinkage and outstanding resistance concrete.

Dosage

In order to meet specific requirements, SNF-5A addition rate should be determined by the materials and the conditions of the experiments and the water-reducing request. The scope of the SNF-5A Powder addition rate is from 0.4kg-1.5kg per 100kg cement materials.

Shelf life

SNF-5A can be stored for 12 months.

Packaging & Shipping

SNF-5A Powder is packaged in plastic knitted bag lined with plastic film and net weight is 25kg/bag.