The purpose of this invention is to provide a kind of hardness of plastering and method of intensity of strengthening.
Plastering is made to adopt mostly and is turned over the system method, and its step is as follows: transfer calcium plaster → pour into rubber moulding → demoulding → drying → post-processed.Wherein post-processed comprises the finishing, painted of plastering.
Transfer calcium plaster at first in a container, to put into an amount of water, then with terra alba equably, loose being sprinkled upon in the water, after treating that terra alba is by the water infiltration, stir into calcium plaster, calcium plaster is poured into rubber moulding, and (calcium plaster moulding) demoulding in 3～5 minutes to be placed is with the plastering seasoning of the system of turning over, repair then, need painted last color.
The present invention is achieved in that and does not change existing processing method of making plastering, only adds an amount of hydrosol of silicic acid in the water of transferring calcium plaster to use, after stirring, transfers calcium plaster with it.The plastering intensity made from this calcium plaster can improve more than 30%, and hardness can improve more than 50%, and expense is cheap, easy and simple to handle.
The plastering that the hydrosol of silicic acid of 2.5%, 5%, 7.5%, 10% different content of per-cent adding is by volume made in the water of transferring calcium plaster to use is tested, and the result is as follows:
| Hydrosol of silicic acid content | Intensity MPOa | Enhancing degree % | Hardness | Increase hardness % |
| 0 | 3.69 | / | 13.3 | / |
| 2.5% | 3.54 | / | 13.7 | 3.0 |
| 5% | 4.44 | 20.3 | 15.6 | 17.3 |
| 7.5% | 4.94 | 33.9 | 20.7 | 55.6 |
| 10% | 4.93 | 33.6 | 20.5 | 54.1 |
Hydrosol of silicic acid is an oyster white colloidal solution, and major ingredient is that silicon accounts for more than 30%, Mg, Ni, Fe, Cu, Ti, Zr, etc. element all account for about 0.001%, Al accounts for 0.005%, Na accounts for 0.03～0.3%.
The present Application Areas of hydrosol of silicic acid is:
(1) is used to do the smart tackiness agent of casting coating, can be used as the investment precoat of housing.
(2) be used for cold rolling silicon steel insulating coating, behind a certain amount of hydrosol of silicic acid of adding, improve the magnetic of insulating coating outward appearance and insulating property, resistance toheat and silicon steel in the coating solution.
(3) be used for the carrier of catalyzer: the cis-butenedioic anhydride carrier is made in the benzene oxidation, soaks with hydrosol of silicic acid, and selectivity and active aspect are all fine.
(4) make the tackiness agent of ceramic fiber of hydrosol of silicic acid, make the upper layer of the refractory brick of High Temperature Furnaces Heating Apparatus, high temperature resistant.
When (5) doing the transformer porcelain core, make tackiness agent, silieonized plate is sticked into one, and play insulation, resistant to elevated temperatures effect with it.
(6) make the tackiness agent of far infrared radiation coating with hydrosol of silicic acid, binding property is good, and is high temperature resistant, do not influence radiation.
Total the above hydrosol of silicic acid mainly serves as tackiness agent and catalyzer.The present invention is the frontier that hydrosol of silicic acid is used with intensity and the hardness that hydrosol of silicic acid is used to improve plastering.