Super-retarded concrete and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A concrete and ultra-retarding technology, which is applied in the field of ultra-retarding concrete and its preparation, can solve the problems of small increase of concrete compressive strength, prolonged concrete setting time, short retardation time, etc. Densification, prolonged setting time effect
Inactive Publication Date: 2019-03-01
青岛康兴混凝土有限公司
View PDF6 Cites 10 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] Although the existing ultra-dry-mixed concrete and its preparation method have a good curing effect, the addition of lignosulfonate, due to the nature of introducing air, increases the compressive strength of t
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example 1-4
[0045] The composition and proportioning of the retarder in Preparation Examples 1-4 are shown in Table 1, and "parts" represent parts by weight.
preparation example 1
[0048] Preparation example 1: the preparation method of retarder comprises the following steps: (1) according to the proportioning in table 1, after 10 parts of phosphogypsum are rinsed with 70 parts of clear water, pulverize and sieve, make the dry powder that diameter is 40um, then in Dry at 45°C;
[0049] (2) Place the dried phosphogypsum powder in a mixed solution of 26 parts of titanate coupling agent and 28 parts of absolute ethanol with a mass fraction of 20%, adjust the pH of the solution to 6.8, and stir while heating , heated to 60°C, and left for 50 minutes; the titanate coupling agent is TCA-105;
[0050] (3) Suction filter the product obtained in step (2), rinse the filter cake with 80 parts of ammonia water with a mass fraction of 15%, then dry at 65°C for 30 minutes, blend with 20 parts of polypropylene, and extrude to granulate .
preparation example 2
[0051] Preparation example 2: the preparation method of retarder comprises the following steps: (1) according to the proportioning in table 1, after 12 parts of phosphogypsum are washed with 80 parts of clear water, pulverize and sieve, make the dry powder that diameter is 42um, then in Dry at 50°C;
[0052] (2) Place the dried phosphogypsum powder in a mixed solution of 30 parts of titanate coupling agent and 30 parts of absolute ethanol with a mass fraction of 25%, adjust the pH of the solution to 6.9, and stir while heating , heated to 65°C, and left for 52 minutes; the titanate coupling agent is TCA-105;
[0053] (3) Suction filter the product obtained in step (2), rinse the filter cake with 83 parts of ammonia water with a mass fraction of 16%, then dry at 66°C for 34 minutes, blend with 25 parts of polypropylene, and extrude to granulate .
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
Particle size
aaaaa
aaaaa
Specific surface area
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses super-retarded concrete and a preparation method thereof. The super-retarded concrete is prepared from the following raw materials in parts by weight: 165-180 parts of water, 280-335 parts of cement, 565-620 parts of sand, 990-1200 parts of stone, 70-85 parts of flyash, 85-110 parts of mineral powder and 7.8-9.4 parts of an additive, wherein the additive is prepared from aretarder and a water reducer according to a mass ratio of 1 to (3.5-4.1). The retarder is prepared from the following components in parts by weight: 10-15 parts of phosphogypsum, 70-100 parts of water, 26-38 parts of a titanate coupling agent, 80-90 parts of an ammonium hydroxide solution with a mass fraction of 15-20%, 28-34 parts of absolute ethyl alcohol with a mass fraction of 20-35% and 20-40parts of polypropylene. The preparation method of the super-retarded concrete comprises the following steps: S1, adding the water reducer and a defoamer into water and fully mixing to obtain a firstmixture; S2, fully mixing corresponding parts by weigh of cement, stone, sand, flyash and mineral powder to form a second mixture; and S3, adding the first mixture into the second mixture, uniformly stirring, then adding the retarder and fully mixing to form the super-retarded concrete. The super-retarded concrete has the advantages of long setting time and high later-stage strength.
Description
technical field [0001] The invention relates to the technical field of concrete preparation, more specifically, it relates to a super retarded concrete and a preparation method thereof. Background technique [0002] With the development of society and the needs of various large-scale projects, the application range of concrete is continuously expanding, and the performance requirements of concrete are also getting higher and higher. [0003] In the prior art, you can refer to the Chinese invention patent application document with the application publication number CN107473672A, which discloses a concrete and its preparation process, including the following components in parts by weight: 290-345 parts of cement; 870-945 parts of sand ; 750-900 parts of stone; 80-105 parts of fly ash; 56-88 parts of slag; 1-3 parts of polycarboxylate water reducer; 0.5-2 parts of expansion agent; 8 parts; 1-2 parts of defoamer; 145-170 parts of water; the cement is P.O42.5 cement; the additiv...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more