The concept of cement-based wear-resistant floor materials
The cement-based wear-resistant floor material is a dry-mixed material composed of Portland cement or ordinary Portland cement and wear-resistant aggregate as a base material and adding appropriate amount of additives.
Classification of cement-based wear-resistant floor materials
Cement-based wear-resistant floor materials can be divided into: type I cement-based wear-resistant floor materials (non-metal oxide aggregates); and type II cement-based wear-resistant floor materials (metal oxide aggregates or Metal aggregates are two types.
(The raw materials are divided into alloy aggregate and mineral aggregate, which are used in industrial plants, workshops, warehouses, docks, parking lots, material centers, underground garages, squares, etc.).
Ground engineering refers to the special ground that is needed for the subsequent construction of civil works for various purposes. The classification of the floor according to the type of use is the simplest. This classification starts from the "requirement" and mainly includes: adapting to the requirements of high impact and high wear resistance required for roadways, parking lots, logistics warehouses, etc.; such as machining workshop Ground anti-oil seepage requirements; chemical production resistance to chemical medium corrosion requirements; computer control room, flour production dust, textile industry fiber dust, fuel oil, flammable and explosive dangerous goods storage base to prevent static electricity accumulation; electronic components Production, operating room, food, medicine, precision machinery production and assembly areas, clean ground requirements, etc., need a variety of special grounds completed by professional construction companies.
The wear-resistant floor can also be divided into wear-resistant particle additive type and high polymer type according to the material. Wear-resistant granule additives include: non-metallic, metal and alloy granule additive type wear-resistant ground, used in workshops, parking lots, large supermarkets, sidewalks and roadways, etc. Such projects can be carried out simultaneously in civil engineering ground works without additional Construction period. GB50037-96 "Building Ground Design Specification" lists iron scrap concrete and cement stone chips as wear-resistant granule additive type. Alloy aggregate concrete is not included. Due to the perfect equipment and processing technology, compressive strength and flexural strength And the tensile strength is greatly improved compared with the standard value. The technical indexes of wear-resistant granule additive type ground mainly include: compressive strength (MPa, ≥): quartz sand 50, silicon carbide 65, ferrosilicon alloy 80, silicon titanium alloy 90; flexural strength (MPa, ≥): quartz sand 10 , Emery 10, ferrosilicon alloy 12, silicon-titanium alloy 13.5; tensile strength (MPa, ≥, GB/T16777-1997): quartz sand 3, silicon carbide 3, ferrosilicon alloy 4, silicon titanium alloy 4; wear resistance (gear method , ≤ g / cm2, GB9966.4-88): quartz sand 02., silicon carbide 0.18, ferrosilicon alloy -, silicon titanium alloy 0.15; surface hardness (Mohs, ≥): quartz sand 7, silicon carbide 7.2, ferrosilicon alloy 7.8, Silicon-titanium alloy 8; surface resistance (Ω): quartz sand, silicon carbide, ferrosilicon alloy 105-108, silicon-titanium alloy 105-108.
Polymers are mainly used in ground engineering polymers, such as epoxy, polyurethane, vinyl ester, acrylate and polyurea. The same polymer can also be water-based, solvent-based and Solvent-based, and suitable for construction under a variety of environmental conditions, fiber reinforcement or the addition of wear-resistant fillers, conductive agents and other multi-layer composite, so that the ground material has good resistance to oil penetration, corrosion, static conduction and other properties, Its surface is hard or elastic. Suitable for a variety of requirements such as mechanical scratch resistance or sports field. The technical index of epoxy conductive static ground (7d, ambient temperature 20 °C) is: compressive strength (MPa, ≥) 85; flexural strength (MPa, ≥) 35; bond strength (MPa, ≥, GB/T5210 ) 2.5 (concrete failure); wear resistance (g / cm2, ≤, GB / T1768) 0.025; surface hardness (pencil hardness H, ≥, GB / T5210) 3; elastic modulus (MPa) 9000; surface resistance (Ω 105～108; chemical corrosion resistance is excellent alkali resistance, medium concentration non-oxidizing acid, non-ester, ketone solvent and low concentration organic acid.
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