Nanometer Silica Nano Silica Used in Concrete Admixture

• CAS No.: 14808-60-7
• Formula: Sio2
• Color: White
• Appearance: Powder
• Average Particle Size: 30nm
• Melting Point: 1650 Degree
• Model NO.: sjz-30
• Density: 2.2g/cm3
• Transport Package: 10kg Bag
• Specification: 30nm
• Trademark: SJZ
• Origin: China
• HS Code: 2804690000
• Production Capacity: 10000/Ton

Product Description

Product model:SJZ-30 special for concrete
The strength of traditional cement-based concrete is low, adding a certain amount of nano-silica instead of a part of ordinary concrete binder, thereby improving the performance of concrete. Through special nano treatment, the surface energy of nano silica is higher, and it is easy to form a combination bond with hydration products in cement stones to produce CSH gel,and nano silica has special network structure, on the base of original network structure of cement paste can establish a new network, thereby forming a three- dimensional network,which can greatly improve the physical and mechanical performance and durability of cement paste. Therefore, nano-silica can be applied to high-strength cement-based pavement material.
 

Project	Indicator
Appearance	white powder
Model	SJZ-30
Average particle size,nm	30
SSA,m2/g	200±10
Surface treatment	Nano-treatment agent
Nano silica purity %	≥ 99.5
Apparent density(g/L)	40-60
PH Value	5-7
Burning weightlessness (%)950ºCx2h	≤6.0

Application: 
1. The compressive and flexural strength of cement mortar can be improved by adding nano-silica into cement mortar.
2. can reduce the slump and expansion of concrete.
3. can increase the self-shrinkage strain of concrete; improve the anti-CL-permeability and anti-freeze durability of concrete.
4. can improve the transition interface structure between aggregate and paste in concrete.
5. It is recommended that nano-silica material be mixed in liquid water reducing agent firstly and then mixed with other materials.

Add amount: It is recommended to add 0.5-1%, users can test according to their actual situation and choose the best added value.