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Novel high sulfur-resistant cement

A technology with high sulfur resistance and cement, which is applied in the field of Portland cement and can solve problems such as unsatisfactory corrosion resistance

Inactive Publication Date: 2007-09-19
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing medium-sulfur-resistance cement and high-sulfur-resistance cement in my country are pure Portland cement that is ground together with Portland cement clinker that meets certain mineral composition requirements and a small amount of dihydrate gypsum. not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: the selected materials are respectively:

[0026] Ordinary silicate clinker: 50.0 kg

[0027] Dihydrate gypsum: 6.0 kg

[0028] Micro-expansion component: 5.0 kg alum stone

[0029] Functional mineral admixture: 39.0 kg silica fume

[0030] Made using the following process:

[0031] 1. Grinding separately:

[0032] 1) Dry functional mineral admixtures such as slag and micro-expansion components in a dryer until the water content is less than 2%, and then grind until the specific surface area is greater than 400m 2 / kg.

[0033] 2) Common silicate clinker and dihydrate gypsum are crushed and ground together according to the proportion until the specific surface area is greater than 400m 2 / kg.

[0034] 3) Mix several powders evenly in proportion.

[0035] 2. Co-grinding:

[0036] 1) According to the grinding requirements, dry and crush the various raw materials required.

[0037] 2) Mix several raw materials according to the designed mixing rati...

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Abstract

The invention discloses a new-type cement with a high resistance to the sulfur which comprises 20-70 wt.% of common silicate grog, 3-10 wt.% of gesso kind, 0-10 wt.% of microdilatancy component, 20-70 wt.% of functionality mineral admixture and 0-2 wt.% of grinding aid. The mineral admixture is composed of grammite, flyash, graining blast-furnace cinder, slag, steel slag, graining blast-furnace phosphorus slag, limestone, kiln dust or other eruption. The cost of the new-type cement with a high resistance to the sulfur is equal to the cement with a medium resistance and cement with a high resistance to the sulfur. The strength is equal to the common silicate cement. But the resistance to sulfate and the resistance to seawater is obviously better than former cement with a medium resistance and cement with a high resistance to the sulfur. The invention can improve the quality of the ocean engineering and beton resists to erosion, prolongs the service life of the beton and has an outstanding technique, economy and community benefit. The new-type cement with a high resistance to the sulfur is widely applied in the ocean engineering.

Description

technical field [0001] The invention relates to engineering materials, in particular to Portland cement with excellent sulfate and seawater erosion resistance. Background of the invention [0002] my country is both a continental country and a maritime country. With the rapid development of my country's economic construction, my country has paid more and more attention to the development of marine resources, the construction of coastal zones and bridges across the sea. For example, docks in marine construction projects, piers of cross-sea bridges, breakwaters, docks, water mobile processing plants, offshore oil drilling platforms, submarine oil tanks and tunnels, and coastal underground pipelines; in addition, in western China such as Qinghai , Xinjiang and other provinces, groundwater and soil in many areas contain a large amount of soluble salts such as rock salt, Glauber's salt, gypsum, etc., SO 4 2- The concentration is high. The existing medium-sulfur-resistance cem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B22/14
CPCC04B7/243Y02P40/10C04B7/19C04B7/21
Inventor 刘云刘克忠王显斌
Owner CHINA BUILDING MATERIALS ACAD
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