What are the categories of cementitious materials? What are the features?

Cementitious material refers to a material that can cement other materials into a whole and has a certain strength. Other materials referred to here include powdered materials (stone powder, etc.), fibrous materials (steel fibers, mineral wool, glass fibers, polyester fibers).

etc.), bulk materials (sand, stones, etc.), block materials (bricks, blocks, etc.), plates (gypsum board.

cement slabs, etc.), etc. Cementitious materials are usually divided into two categories: organic cementitious materials and inorganic cementitious materials. Organic cementitious materials refer to a class of cementitious materials with natural or synthetic polymer compounds as the basic composition.

The most commonly used are asphalt, resin, rubber, etc. Inorganic cementitious concrete, inorganic cementitious concrete includes lime siliceous cementitious concrete (such as Portland concrete), Portland cement.

Concrete (such as Portland cement, ordinary cement, slag cement, fly ash cement, pozzolana cement, early strength cement concrete, etc.), calcare-aluminum cement concrete (such as high-alumina cement, pure aluminate cement, shotcrete, super-speed hard cement concrete, etc.), gypsum concrete, magnesia cement concrete, sulfur concrete, water glass.

Sodium fluorosilicate concrete, metal concrete, metal instead of cement as cementing materials, etc. Organic cementitious material: concrete. Organic cementitious material concrete mainly includes asphalt concrete.

and polymer cement concrete, resin concrete, polymer impregnated concrete, etc. In addition, inorganic and organic composite colloidal material concrete can also be divided into polymer cement concrete and polymer indigo concrete. According to different chemical compositions, cementitious materials can be divided into two categories: organic cementitious materials and inorganic cementitious materials.

Organic cementitious materials are commonly used in various asphalt, resins, rubber, etc. Inorganic cementitious materials can be divided into two categories: gas-hard cementitious materials and hydraulic cementitious materials according to different hardening conditions. Gas-hard cementitious materials can only be condensed and hardened in the air, maintaining and developing their strength materials, commonly used lime, gypsum, water glass, water chestnut and so on.

The softening coefficient of air-hard cementitious material is small and the frost resistance is poor, so it is suitable for indoor engineering parts that are not in long-term contact with water, but not suitable for use in humid environments and cannot be used in water.

Hydraulic cementitious material can not only be coagulated and hardened in the air, but also can be better coagulation and hardening in water, maintain and develop its strength of the material, and there are various cements commonly used. Hydraulic cementitious materials have good water resistance and can be used in dry environments, as well as in wet environments such as underground or underwater engineering. Petroleum asphalt, polymer resin, glutinous rice juice and animal blood used in ancient times belong to organic cementitious materials.

Inorganic cementitious materials are usually in powder form, which are mixed with water to form a plastic slurry, and after a certain period of time, they solidify and harden into a solid with certain strength and cohesiveness. The most commonly used inorganic cementitious materials are cement, lime, gypsum, etc., according to their coagulation and hardening conditions and applicable environment, inorganic cementitious materials are divided into two categories: air hard and water hard. The so-called air-hard cementitious material refers to the cementitious material that can only be condensed and hardened in the air, and can only maintain and develop its strength in the air, lime, gypsum, water glass, etc. belong to this category.

Hydraulic cementitious materials, on the other hand, can harden not only in air but also better in water, maintaining and continuing to develop their strength. A large number of cement used in construction projects is a hydraulic cementitious material. Aerocementitious materials can only be used above ground level in dry environments, while hydraulic cementitious materials can be used in both dry environments and underground or underwater environments.

Cementitious materials are divided into two categories: organic and inorganic. The former mainly includes asphalt and various resins, and the latter is divided into two types: hydraulic and non-hydraulic according to its hardening conditions. After hydraulic cementitious materials and water are pulped, they can cement materials such as sand and gravel and harden in air and water, which is commonly called cement.

Non-hydraulic cementitious materials can only be hardened in air, also known as air-hard cementitious materials, such as lime, gypsum, magnesia cementitious materials, etc.

Concrete cementitious materials include cement, water, slag powder, fly ash, silica fume and other materials that actively participate in cement hydration. Secondly, concrete can be divided into cement concrete, gypsum concrete, asphalt concrete, polymer concrete, etc. according to cementitious materials.

According to the different chemical compositions, cementitious materials can be divided into inorganic and organic two categories, lime, gypsum, cement and other construction sites commonly known as "ash" building materials belong to inorganic cementitious materials, while asphalt, natural or synthetic resins and other organic cementitious materials.

Cementitious material significance:

In building materials, after a series of physical and chemical actions, it can change from a slurry to a solid stone-like body, and can cement other solid materials into a whole with a certain mechanical strength of the substance.

Through its own physical and chemical action, in the process of changing from a plastic slurry to a hard stone, it can bond the bulk or block material into a whole material.

cementitious material. It refers to the ability to remove loose materials (such as sand and stone) or blocks in construction projects.

Materials (e.g. bricks, tiles, etc.) are cemented into a monolithic material.

Hydraulic cementitious materials refer to those that can not only harden in air, but also better in water, maintain and continue to develop their strength, such as the most typical is all kinds of cement.

Cement is in powder form, mixed with water, and can be made of plastic pulp through a physicochemical process.

The body becomes a hard stony body, and can cement the bulk material into a whole, which is a good mineral cementitious material. Cement not only hardens in air, but also hardens better in water.

chemical, maintain and develop strength, so cement belongs to the hydraulic cementitious material, it can be used.

Works above ground, underground, and in water.

Cement was the first cement patent granted in 1824 by the British engineer Aspdih, marking the invention of cement. The invention of cement provided a material basis for the development of construction engineering, which developed from land engineering to water and underground engineering. There has been one invention of cement so far.

With a history of more than 100 years, it has always been the most widely used and most used cementitious material.

Concrete cementitious materials include cement, lime powder and other active materials involved in cement hydration, according to the different composition of materials, concrete materials can also be divided into organic and inorganic two categories. 2. Cementitious materials refer to substances with great strength that are synthesized into very strong substances through stirring and mixing in building materials, which are called cementitious materials. The classification of cementitious materials can be divided into two categories:

Hydraulic cementitious materials, also known as cement, and rigid cementitious materials.

1. Types: 1Inorganic cementitious materials: Gas-hard nature: can only harden in air; lime, gypsum and water glass; Hydraulic hardness: not only in the air and cavity, but also very well hardened in water; Cement.

2.Organic cementitious material: asphalt.

2. Use: Cementitious material refers to the material that can bond the bulk or block material into a whole through its own physical and chemical action, from a plastic slurry to a hard stone body, also known as a cemented material and a dry material.

Cementitious materials include ordinary lime, cement, fly ash, silica fume, etc., which are known as cementing materials on construction sites.

Gelatinous substances, also known as cementitious materials, can turn mud into hard stone-like objects under the impetus of physics and chemistry, and can also condense other substances to make composite solid objects with mechanical strength. Among the materials in civil engineering, as long as the material is pasted into a whole object by physical and chemical changes, it can be called a cementitious material.

According to the chemical composition, cementitious materials include organic and inorganic, and fly ash materials are called inorganic cementitious materials. According to the hardening standard, the inorganic rubber shed is divided into two types: air hardness and water hardness, while asphalt and natural synthetic resin belong to organic cementitious materials. Inorganic cementitious materials can be divided into two categories: air hardness and hydraulic hardness according to their different hardening conditions.

Characteristics and selection principles of different gel materials

Gas-hard cementitious materials such as lime, gypsum, water glass, etc.: 1. Their gelling process can only be formed and developed in the air environment, and must not be watered and cured; 2. Usually their gelling process is very long, and the strength development is slow; 3. They all have good workability and are convenient for construction; 4. Their final strength is not very high, and they are not suitable for making load-bearing components with large loads; 5. It cannot be used to match with the steel bar to work together to bear a large load chain macro load.

The selection principles are: 1. Determine the materials to be bonded, Huai judgment glass to glass, metal to glass, plastic to plastic, etc.; 2. Determine the bonding process, whether it is heating curing, UV lamp irradiation, or moisture curing, etc.; 3. Determine the role of the required adhesive, whether it is used for potting, sealing or bonding, and whether the bonding strength is required or not.

The above content reference: Encyclopedia - cementitious materials.

1. Common lime, cement, fly ash, silica fume, etc. are called cementitious materials on the construction site, and according to the difference in chemical composition, cementitious materials can be divided into organic and inorganic two categories, and gray building materials can be regarded as inorganic cementitious materials.

2. Inorganic cementitious materials can also be divided into two types: air hardness and hydraulic hardness according to the hardening standard, while asphalt and natural synthetic resin are organic cementitious materials.

1. Cementitious material, also known as cementitious material. Under the physical and chemical action, it can change from a slurry to a solid stone-like body, and can cement other materials to make a composite solid substance with certain mechanical strength. Among civil engineering materials, all materials that can bond bulk or bulk materials into a whole through a series of physical and chemical changes are collectively referred to as cementitious materials.

2. Cementitious material refers to the material that can bond the bulk or block material into a whole through its own physical and chemical action, which can be bonded into a whole in the process of changing from a plastic slurry to a hard stone, also known as a cemented material.