Lightweight conductive mortar material, preparation method therefor and method of using thereof

Patent metadata

Field	Value
Publication number	US-2020308053-A1
Application number	US-201716644508-A
Country	US
Kind code	A1
Filing date	Dec 26, 2017
Priority date	Sep 11, 2017
Publication date	Oct 1, 2020
Grant date	—

Abstract

Disclosed are a lightweight conductive mortar material, a preparation method therefor and use thereof. The lightweight conductive mortar material includes the following components in parts by weight: 100 parts of cement, 25 parts to 60 parts of a conductive porous lightweight aggregate loaded with a modified agar gel, and 30 parts to 45 parts of water.

First claim

1 . A lightweight conductive mortar material, the lightweight conductive mortar material comprises the following components in parts by weight: 100 parts of cement, 25 to 60 parts of a conductive porous lightweight aggregate loaded with a modified agar gel, and 30 to 45 parts of water.

2 . The lightweight conductive mortar material according to claim 1 , wherein the cement is ordinary Portland cement or composite Portland cement with a strength grade of 42.5 or more.

3 . The lightweight conductive mortar material according to claim 1 , wherein the conductive porous lightweight aggregate loaded with the modified agar gel is prepared through the following method:
(1) adding agar powder into water and heating until the agar powder is completely dissolved, adding inorganic electrolytes, keeping that a temperature of the solution is above 90° C. and continuously stirring the solution for more than 30 seconds, and supplementing boiling water with a corresponding mass lost by evaporation to prepare a modified agar aqueous solution; and then adding graphite powder into the modified agar aqueous solution, and forcibly stirring at a rotating speed of 60 r/min or more to evenly disperse the graphite powder into the modified agar aqueous solution; and (2) immersing porous ceramsites into the modified agar aqueous solution dispersed with the graphite powder, keeping the temperature above 80° C. and continuously stirring for more than 2 minutes, taking out the porous ceramsites, cooling the agar on surfaces of the porous ceramsites by air to solidify into gel, and peeling off excess agar gel to obtain the conductive porous lightweight aggregate loaded with the modified agar gel.

4 . The lightweight conductive mortar material according to claim 3 , wherein in the step (1), the inorganic electrolytes comprise sodium hydroxide, potassium hydroxide and calcium hydroxide.

5 . The lightweight conductive mortar material according to claim 4 , wherein in the step (1), in parts by weight, the lightweight conductive mortar material comprises 100 parts of water, 4 to 10 parts of agar powder, 2 to 10 parts of graphite powder, 0.1 to 1.8 parts of sodium hydroxide, 1.0 to 2.8 parts of potassium hydroxide, and 1.0 to 8.9 parts of calcium hydroxide.

6 . The lightweight conductive mortar material according to claim 3 , wherein in the step (2), the porous ceramsites are clay porous ceramsites with an apparent density of no more than 1.19 g/cm 3 , a water absorption rate of 6.48% or more, an average particle size of no less than 3.26 mm and a cylinder compressive strength of no less than 2.0 MPa.

7 . The lightweight conductive mortar material according to claim 1 , wherein a particle size of the conductive porous lightweight aggregate loaded with the modified agar gel is between 3.5 mm and 4.0 mm.

8 . A method for preparing the lightweight conductive mortar material according to claim 1 , the method comprises the following step:
in said parts by weight, adding cement and water into a stirrer for pre-stirring, then adding a conductive porous lightweight aggregate loaded with modified agar gel for sufficient stirring and even mixing to obtain the lightweight conductive mortar material.

9 . A method of using the lightweight conductive mortar material according to claim 1 in cathodic protection of a reinforced concrete structure, the method comprises covering a surface of the reinforced concrete structure with the lightweight conductive mortar material, or using the lightweight conductive mortar material for filling a concrete-gouged groove containing a primary anode inert metal electrode.

10 . The method according to claim 9 , wherein a construction method for said covering comprises manual coating or mechanical spraying to form a 20 mm to 40 mm thick conductive mortar layer.

11 . A method for preparing the lightweight conductive mortar material according to any one of claim 2 , the method comprises the following step:
in said parts by weight, adding cement and water into a stirrer for pre-stirring, then adding a conductive porous lightweight aggregate loaded with modified agar gel for sufficient stirring and even mixing to obtain the lightweight conductive mortar material.

12 . A method for preparing the lightweight conductive mortar material according to any one of claim 3 , the method comprises the following step:
in said parts by weight, adding cement and water into a stirrer for pre-stirring, then adding a conductive porous lightweight aggregate loaded with modified agar gel for sufficient stirring and even mixing to obtain the lightweight conductive mortar material.

13 . A method for preparing the lightweight conductive mortar material according to any one of claim 4 , the method comprises the following step:
in said parts by weight, adding cement and water into a stirrer for pre-stirring, then adding a conductive porous lightweight aggregate loaded with modified agar gel for sufficient stirring and even mixing to obtain the lightweight conductive mortar material.

14 . A method for preparing the lightweight conductive mortar material according to any one of claim 5 , the method comprises the following step:
in said parts by weight, adding cement and water into a stirrer for pre-stirring, then adding a conductive porous lightweight aggregate loaded with modified agar gel for sufficient stirring and even mixing to obtain the lightweight conductive mortar material.

15 . A method for preparing the lightweight conductive mortar material according to any one of claim 6 , the method comprises the following step:
in said parts by weight, adding cement and water into a stirrer for pre-stirring, then adding a conductive porous lightweight aggregate loaded with modified agar gel for sufficient stiffing and even mixing to obtain the lightweight conductive mortar material.

16 . A method for preparing the lightweight conductive mortar material according to any one of claim 7 , the method comprises the following step:
in said parts by weight, adding cement and water into a stirrer for pre-stirring, then adding a conductive porous lightweight aggregate loaded with modified agar gel for sufficient stiffing and even mixing to obtain the lightweight conductive mortar material.

17 . A method of using the lightweight conductive mortar material according to claim 2 in cathodic protection of a reinforced concrete structure, the method comprises covering a surface of the reinforced concrete structure with the lightweight conductive mortar material, or using the lightweight conductive mortar material for filling a concrete-gouged groove containing a primary anode inert metal electrode.

18 . A method of using the lightweight conductive mortar material according to claim 3 in cathodic protection of a reinforced concrete structure, the method comprises covering a surface of the reinforced concrete structure with the lightweight conductive mortar material, or using the lightweight conductive mortar material for filling a concrete-gouged groove containing a primary anode inert metal electrode.

19 . A method of using the lightweight conductive mortar material according to claim 4 in cathodic protection of a reinforced concrete structure, the method comprises covering a surface of the reinforced concrete structure with the lightweight conductive mortar material, or using the lightweight conductive mortar material for filling a concrete-gouged groove containing a primary anode inert metal electrode.

20 . A method of using the lightweight conductive mort

Assignees

• Univ South China Tech

Inventors

• Hu Jie
• Guo Wenhao
• Yu Qijun
• Zhu Yangyang
• Zhang Jiyao
• Zhang Zhangmin
• Wei Jiangxiong
• Li Fangxian
• Ma Yuwei

Classifications

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C04B2111/26

  Corrosion of reinforcement resistance · CPC title

• C04B20/023

  Chemical treatment · CPC title

• C04B2111/00525

  for metallic surfaces · CPC title

• C04B2111/94

  Electrically conducting materials · CPC title