What is the difference between lithium based concrete sealing curing agent and sodium based and potassium based curing agent?
What is the difference between lithium based concrete sealing curing agent and sodium based and potassium based curing agent?
(1) The permeability of lithium based concrete sealing curing agent is better
Lithium silicate is alkaline, weak, C-S-H gel forming slowly, can make the effective ingredients penetrate deeper; and the reaction of sodium silicate and potassium silicate is more intense, so that the C-S-H gel quickly compacts the pores of the concrete surface, and hinders the penetration of the curing agent in the deep direction. Therefore, in the concrete curing agent reaction speed, “fast” is not good.
In addition, the polymerization degree of lithium silicate is smaller and the penetration is deeper.
(2) There is no ASR reaction (alkali silicate reaction) of lithium based concrete sealing curing agent
ASR reaction is actually one of AAR (alkali aggregate reaction), which is called cancer of concrete. It is because the aggregate is eroded by alkali, forming alkali silica gel, sodium and potassium based hydrophilicity is strong, easy to absorb moisture from air and concrete, expand the system in place, and then lead to cracks in concrete. However, lithium is relatively stable and does not absorb water. Even in high humidity environment, it will not expand, thus fundamentally curbing the problem of turtle cracks.
(3) The hardness and wear resistance of lithium based concrete sealing curing agent are better
The Mohs hardness of the ground made of sodium base and potassium base sealing curing agent can reach 6-7, and that of lithium base can be higher, reaching 7-9, and the wear resistance is also better.
(4) Lithium based concrete sealing curing agent has good water resistance
Sodium based and potassium based sealing curing agents are not resistant to water, and the ground is easy to lose light after blistering, while lithium-based materials have excellent resistance to dry and wet alternation, which can be widely used in indoor and outdoor concrete floor.
(5) There is no efflorescence phenomenon in lithium based concrete sealing curing agent
There is a big problem in the use of Na based and K-based sealing curing agents, that is, there is efflorescence and whitening, while lithium-based does not. The by-product of silicic acid, or sodium hydroxide, reacts with water to form a white substance on the surface of concrete.
(6) The gloss of lithium based concrete sealing curing agent is better
The floor with sodium based and potassium based sealing and curing agent materials has a dull glossiness, while the floor made of lithium based sealing and curing agent can obviously feel different, with permeability and brightness lasting better than that of sodium based and potassium based materials.
