Rapid-hardening mortar composition

Patent metadata

Field	Value
Publication number	US-2020317576-A1
Application number	US-201716078652-A
Country	US
Kind code	A1
Filing date	Mar 31, 2017
Priority date	Mar 31, 2016
Publication date	Oct 8, 2020
Grant date	—

Abstract

This rapid-hardening mortar composition includes: a rapid-hardening admixture; cement; and a fine aggregate, wherein the cement is contained in an amount of 100 parts by mass to 2,000 parts by mass with respect to 100 parts by mass of the rapid-hardening admixture, the rapid-hardening admixture is a composition that contains: calcium aluminate; inorganic sulfate in an amount of 50 parts by mass to 200 parts by mass with respect to 100 parts by mass of the calcium aluminate; and a setting modifier in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the calcium aluminate, and an average particle diameter of the calcium aluminate is in a range of 8 μm to 100 μm, and an average particle diameter of the setting modifier is in a range of 5 μm or less.

First claim

1 : A rapid-hardening mortar composition, comprising:
a rapid-hardening admixture; cement; and a fine aggregate, wherein the cement is present in an amount of 100 parts by mass to 2,000 parts by mass with respect to 100 parts by mass of the rapid-hardening admixture, the rapid-hardening admixture is a composition that comprises: calcium aluminate; inorganic sulfate in an amount of 50 parts by mass to 200 parts by mass with respect to 100 parts by mass of the calcium aluminate; and a setting modifier in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the calcium aluminate, an average particle diameter of the calcium aluminate is in a range of 8 μm to 100 μm, and an average particle diameter of the setting modifier is in a range of 5 μm or less.

2 : The rapid-hardening mortar composition according to claim 1 ,
wherein the fine aggregate is present in an amount of 200 parts by mass to 1,000 parts by mass with respect to 100 parts by mass of the rapid-hardening admixture.

3 : The rapid-hardening mortar composition according to claim 2 , wherein the rapid-hardening mortar composition is a patching repair material.

4 : The rapid-hardening mortar composition according to claim 1 , wherein the fine aggregate is present in an amount of 10% by mass to 67% by mass with respect to an entire amount of the rapid-hardening mortar composition.

5 : The rapid-hardening mortar composition according to claim 4 , wherein the rapid-hardening mortar composition is an injection grout for pavement.

6 : The rapid-hardening mortar composition according to claim 1 , wherein the setting modifier comprises at least one selected from the group consisting of an inorganic carbonate, an oxycarboxylic acid, sodium aluminate, and sodium sulfate.

7 : The rapid-hardening mortar composition according to claim 1 , wherein the setting modifier is present so that an amount of the setting modifier with respect to an entire amount of the rapid-hardening mortar composition is in a range of 0.01% by mass to 5% by mass.

8 : The rapid-hardening mortar composition according to claim 7 , wherein the setting modifier is present as a highly concentrated-setting modifier-containing mixture, and
the highly concentrated-setting modifier-containing mixture comprises an inorganic powder and the setting modifier in an amount of from 50 parts by mass to 300 parts by mass with respect to 100 parts by mass of the inorganic powder.

9 : The rapid-hardening mortar composition according to claim 1 , further comprises
short fibers that consist of one or more of organic short fibers and carbon short fibers in an amount of 0.1% by mass to 0.3% by mass with respect to an entire amount of the rapid-hardening mortar composition.

10 : The rapid-hardening mortar composition according to claim 1 , further comprises
a powdered emulsion in an amount of 0.5% by mass to 30% by mass with respect to an entire amount of the rapid-hardening mortar composition.

11 : The rapid-hardening mortar composition according to claim 1 , further comprises
silica fume in an amount of 1% by mass to 15% by mass with respect to an entire amount of the rapid-hardening mortar composition.

12 : The rapid-hardening mortar composition according to claim 1 , further comprises
a synthetic polymer-based thickening water-retention agent in an amount of 0.1% by mass to 0.3% by mass with respect to an entire amount of the rapid-hardening mortar composition.

13 : The rapid-hardening mortar composition according to claim 1 , further comprises
an anti-freezing agent that consists of one or more of sodium acetate, calcium acetate, and calcium nitrite in an amount of 1% by mass to 10% by mass with respect to an entire amount of the rapid-hardening mortar composition.

Assignees

• Mitsubishi Materials Corp

Inventors

• Kamitani Kiyoshi
• Kimoto Daisuke
• Tokunaga Kenji
• Tawara Hideo

Classifications

• C04B2111/72

  Repairing or restoring existing buildings or building materials · CPC title

• C04B28/04 Primary

  Portland cements · CPC title

• C04B40/0042

  Powdery mixtures · CPC title

• C04B2111/29

  Frost-thaw resistance · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title