Plastit SPN1- Naphthalene base superplasticizer

High Range Water Reducing Admixture

Plastit SPN1 is a chloride free, superplasticising admixture based on selected sulphonated napthalene polymers. It is supplied as a brown solution which instantly disperses in water. Plastit SPN1 disperses the fine particles in the concrete mix, enabling the water content of the concrete to perform more effectively. The very high levels of water reduction possible allow major increases in strength to be obtained. Plastit SPN1¬¬ is suitable for concrete with water-cement ratio is higher than 40%.
The optimum dosage of Plastit SPN1 to meet specific requirements should always be determined by trials using the materials and conditions that will be experienced in use. The normal dosage range is 0.4 to 1.5 Kg/100 kg of cementitious material, including PFA, GGBFS and microsilica. 
Plastit SPN1 conforms with BS 5075 Part 3 and with ASTM C494 as Type A and Type F, depending on dosage used.