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Concrete cementing material

A cementitious material and concrete technology, applied in the field of building materials, can solve the problems of being susceptible to corrosion, high cost, incompatibility between minerals and seawater, etc., and achieve the effect of reducing production costs and improving durability

Active Publication Date: 2018-05-04
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the need for long-distance transportation of fresh water, gravel, river sand, etc. for the cementitious materials used in the existing sea island construction. In order to solve the problem of being damaged by corrosion, a special cementitious material with low cost, good durability, and the ability to use seawater and sea sand to mix concrete is proposed

Method used

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Embodiment 1

[0027] As a preferred embodiment of the present invention, this embodiment discloses a concrete cementitious material, and this embodiment includes:

[0028] A kind of concrete cementitious material, comprises the composition of following percentage by weight: Specific surface area is 360m 2 / kg high alumina cement clinker 20%, the specific surface area is 500m 2 / kg of basalt 60%, quicklime 20%.

[0029] After mixing evenly, prepare mortar samples with seawater according to the water-cement ratio W / C=0.6, and sea sand at a ratio of 1:3. Refer to the mortar molding method of the standard GB / T17671-1999, in an environment of 25-30°C Take care of nature. The physical properties of the prepared cementitious material are as follows:

[0030]

Embodiment 2

[0032] As a preferred embodiment of the present invention, this embodiment discloses a concrete cementitious material, and this embodiment includes:

[0033] A kind of concrete cementitious material, comprises the composition of following percentage by weight: Specific surface area is 350m 2 / kg high alumina cement clinker 30%, the specific surface area is 500m 2 / kg of fly ash 50%, quicklime 20%. Al in the high alumina cement clinker 2 o 3 The content is 45%.

[0034] After mixing evenly, prepare mortar samples with seawater according to the water-cement ratio W / C=0.6, and sea sand at a ratio of 1:3. Refer to the mortar molding method of the standard GB / T17671-1999, in an environment of 25-30°C Take care of nature.

[0035] The physical properties of the prepared cementitious material are as follows:

[0036]

Embodiment 3

[0038] As a preferred embodiment of the present invention, this embodiment discloses a concrete cementitious material, and this embodiment includes:

[0039] A kind of concrete cementitious material, comprises the composition of following percentage by weight: Specific surface area is 350m 2 / kg of sulphoaluminate cement clinker 25%, the specific surface area is 500m 2 / kg of pumice powder 60%, quicklime 25%. The 1-day strength of the sulphoaluminate cement clinker is 30 MPa, the 3-day strength is 52.5 MPa, and the 28-day compressive activity index of the pumice powder is 70%.

[0040] After mixing evenly, prepare mortar samples with seawater according to the water-cement ratio W / C=0.6, and sea sand at a ratio of 1:3. Refer to the mortar molding method of the standard GB / T17671-1999, in an environment of 25-30°C Take care of nature.

[0041] The physical properties of the prepared cementitious material are as follows:

[0042]

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Abstract

The invention relates to the technical field of building materials and in particular relates to a concrete cementing material. The concrete cementing material comprises the following components in percentage by weight: 10-30% of cement clinker, 30-80% of a pozzolanic material and 20-40% of quick lime. According to the concrete cementing material disclosed by the invention, the high-alumina pozzolanic material is selected, seawater serves as mixing water, a hydrothermal synthesis method is simulated by utilizing the characteristic that the quick lime and the water are contacted to rapidly release heat, and formation of minerals is accelerated; the pozzolanic material takes alkalinity of the seawater and alkalinity of the quick lime as alkali activation for activating the activity of pozzolan; and a small amount of auxiliary sulfoaluminate cement clinker or high-alumina cement clinker is combined with sulfate ions, chloride ions and the like in the seawater so as to form early strength minerals, so that the construction requirements are met.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a concrete cementitious material. Background technique [0002] my country is a large ocean country. In recent years, the construction of marine islands and reefs is facing heavy construction tasks. The construction of civil and military docks, offshore airports, offshore wind power stations, offshore lighthouses and radar stations, and frontier fortifications on islands and reefs is in full swing. However, in the early application process of marine concrete, obvious concrete erosion and cracking have appeared in just a few years. [0003] What kind of cementitious material can achieve good corrosion resistance in seawater? Scholars at home and abroad have done a lot of research. In recent years, my country has also researched and developed a new type of slag cement, using slag micropowder as the cement mixture, and successfully developed marine portland cement. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/34
CPCC04B7/34
Inventor 陈雪梅许毅刚钟文喻庆华张凌志
Owner JIAHUA SPECIAL CEMENT