JPS649837A - Activation of siliceous powder - Google Patents

Activation of siliceous powder

Info

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
Application number
JP16369087A
Other languages
Japanese (ja)
Inventor
Michio Uemura
Shunichiro Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NICHIJIYUU RES CENTER KK
Original Assignee
NICHIJIYUU RES CENTER KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NICHIJIYUU RES CENTER KK filed Critical NICHIJIYUU RES CENTER KK
Priority to JP16369087A priority Critical patent/JPS649837A/en
Publication of JPS649837A publication Critical patent/JPS649837A/en
Pending legal-status Critical Current

Links

Landscapes

  • Silicon Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (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.
JP16369087A 1987-06-30 1987-06-30 Activation of siliceous powder Pending JPS649837A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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