JPS649837A - Activation of siliceous powder - Google Patents
Activation of siliceous powderInfo
- Publication number
- JPS649837A JPS649837A JP16369087A JP16369087A JPS649837A JP S649837 A JPS649837 A JP S649837A JP 16369087 A JP16369087 A JP 16369087A JP 16369087 A JP16369087 A JP 16369087A JP S649837 A JPS649837 A JP S649837A
- Authority
- JP
- Japan
- Prior art keywords
- siliceous powder
- concrete
- aqueous solution
- powder
- activation agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Silicon Compounds (AREA)
Abstract
PURPOSE:To obtain a siliceous powder suitable especially as a concrete admixture, by reacting siliceous powder with an activation agent such as ammonia or aliphatic amine and removing the activation agent from the reaction product. CONSTITUTION:Siliceous powder is activated by contacting with ammonia (e.g. aqueous solution of NH3 or NH3 gas) or an aliphatic amine (e.g. primary amine, secondary amine or aliphatic amine having unsaturated carbon bond). The contact treatment is carried out e.g. in the case of an aqueous solution of NH3 by mixing silica powder with 0-5wt.% of an aqueous solution of NH3 having a concentration of about 1-6N, leaving standing, and stirring or agitating the mixture for 30min-5hr. The activated siliceous powder is heat-treated or evacuated to evaporate and recover the activation agent. The compounding of the obtained siliceous powder to cement mortar or concrete is effective in improving the early strength of concrete, remarkably decreasing the hydration heat and shrinkage and increasing the density of the concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16369087A JPS649837A (en) | 1987-06-30 | 1987-06-30 | Activation of siliceous powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16369087A JPS649837A (en) | 1987-06-30 | 1987-06-30 | Activation of siliceous powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS649837A true JPS649837A (en) | 1989-01-13 |
Family
ID=15778750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16369087A Pending JPS649837A (en) | 1987-06-30 | 1987-06-30 | Activation of siliceous powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS649837A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0584143U (en) * | 1992-04-13 | 1993-11-12 | 株式会社豊田自動織機製作所 | Power element short circuit prevention circuit |
| JP2011523392A (en) * | 2007-12-20 | 2011-08-11 | ユニバーシティ オブ セントラル フロリダ リサーチ ファウンデーション，インコーポレイテッド | Structural materials with almost zero carbon emissions |
| CN110255569A (en) * | 2019-07-01 | 2019-09-20 | 杨鈜博 | A method of directly production prepares white carbon black from quartz mineral powder |
-
1987
- 1987-06-30 JP JP16369087A patent/JPS649837A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0584143U (en) * | 1992-04-13 | 1993-11-12 | 株式会社豊田自動織機製作所 | Power element short circuit prevention circuit |
| JP2011523392A (en) * | 2007-12-20 | 2011-08-11 | ユニバーシティ オブ セントラル フロリダ リサーチ ファウンデーション，インコーポレイテッド | Structural materials with almost zero carbon emissions |
| CN110255569A (en) * | 2019-07-01 | 2019-09-20 | 杨鈜博 | A method of directly production prepares white carbon black from quartz mineral powder |
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