Environmental Causes of Cracking in Exterior Wall Insulation Mortar
Cracking caused by deformation of the wall structure: uneven foundation settlement, excessive spacing between transverse walls, failure to provide reinforcement at stress-concentrated corners of brick walls, overly large door and window openings, and improper placement of expansion joints can all lead to insufficient strength, stiffness, and stability in the wall, resulting in structural deformation cracks and subsequent cracking of the mortar layer.
20
2020
/
04
The Role of Polycarboxylate Superplasticizers in Mortar and Concrete
Water-reducing agents primarily enhance the strength of mortar; they are admixtures that reduce water content and improve strength without compromising the workability of mortar and concrete during placement. Polycarboxylate superplasticizers are a new generation of high-performance water reducers developed in recent years, characterized by outstanding water-reducing efficiency, flowability, and penetrability. They significantly increase the strength of cement mortars; however, their production process is complex, and their cost is slightly higher than that of other water-reducing agents.
13
2020
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04
Performance Advantages of Permeable Concrete Pavements
Pervious concrete pavement is a type of surface paving whose internal structure consists of a skeletal framework of interconnected pores that are in communication with the external atmosphere, while simultaneously meeting the strength and durability requirements for road and paving applications.
06
2020
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04
Comprehensive Utilization of Desulfurization Gypsum
Desulfurization gypsum is a byproduct of wet flue-gas desulfurization in coal-fired power plants and is primarily generated at these facilities. With the application and promotion of comprehensive utilization technologies for desulfurization gypsum, perceptions of this material have shifted: what was once regarded as a waste discharge from power plants is now seen as a valuable resource, thereby attracting greater interest from stakeholders.
03
2020
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04
The Role of Adding Polycarboxylate Superplasticizer to Gypsum
The first-generation polycarboxylate-based high-range water-reducing admixture is a methacrylic acid/methyl methacrylate copolymer, which is synthesized via the basic polymerization of methacrylic acid and methyl methacrylate, with ester linkages connecting the main chain and side chains. The second-generation polycarboxylate-based high-range water-reducing admixture is an acrylate ether copolymer, characterized by the presence of an ether linkage between the main chain and the side chains; this type is referred to as a polycarboxylate ether high-range water-reducing admixture and is a strictly alternating copolymer, since acrylate ethers do not promote uniform polymerization.
27
2020
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03
Main Functions of Additives in Dry-Mix Mortar
Due to their limited variety and poor performance, traditional mortars are increasingly unable to meet the demands of practical engineering applications. Dry-mix mortars are being progressively promoted and adopted, and the development of admixtures for dry-mix mortars is the key technical factor in this promotion.
23
2020
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03