(1) Selection of types and strength grades of masonry mortar
1. Types of masonry mortar
Commonly used masonry mortars include cement mortar, lime mortar, cement-lime mixed mortar, and the like.
Cement mortar is suitable for masonry work in humid environment and water; lime mortar is only used for low strength and dry environment
Masonry engineering; mixed mortar is not only easy to work with, but also can be made into masonry mortar of various strength grades. It can be widely used in various masonry projects except for masonry with high water resistance requirements. .
2. Selection of masonry mortar strength grade
Under normal circumstances, multi-storey building walls use M1-M10 masonry mortar; masonry foundation, inspection well, rainwater well
For masonry, M5 mortar is often used; masonry of industrial workshops, substations, basements and other masonry are selected from M2.5-M10 masonry mortar; for buildings below the second floor, mortars of M2.5 and below are commonly used; for simple bungalows and temporary buildings, lime is available. mortar.
(2) Mixing ratio of masonry mortar
The workability of the mortar mixture should meet the construction requirements, and the bulk density of the new mortar: cement mortar should not be less than 1900 thousand
G/m3; mixed mortar should not be less than 1800 kg/m3. The mix ratio of masonry mortar is generally checked in the construction manual or based on experience.
(3) Mixing of mortar
The mortar is generally mixed with a mortar mixer, and the mixing is required to be uniform. In order to improve the water retention of the mortar, plasticizers such as clay, electric gypsum and fly ash may be incorporated. The mortar should be used with the mix. If the mortar appears to be bleeding, it should be mixed again. Cement mortar and mixed mortar must be used within 3h and 4h after mixing. If the temperature is above 30°C, they must be used within 2h and 3h.
Xenon Arc Lamp Aging Test Chamber
A Xenon Arc Lamp Aging Test Chamber is a specialized testing equipment used to simulate the aging effects of sunlight on various materials and products. It is commonly used in industries such as automotive, aerospace, and textiles to evaluate the durability and performance of materials under prolonged exposure to sunlight.
The chamber consists of a xenon arc lamp, which emits a broad spectrum of light similar to sunlight, and a sample holder where the materials or products to be tested are placed. The lamp emits high-intensity light, including ultraviolet (UV), visible, and infrared (IR) radiation, which can be adjusted to simulate different weather conditions and intensities of sunlight.
The test chamber is designed to control various parameters such as temperature, humidity, and light intensity to accurately replicate real-world conditions. It can simulate different weather conditions, such as sunlight, rain, and humidity, to assess the effects of these conditions on the materials being tested.
By subjecting materials to prolonged exposure in the Xenon Arc Lamp Aging Test Chamber, manufacturers can evaluate the effects of sunlight on color fading, material degradation, cracking, peeling, and other forms of deterioration. This information helps them make informed decisions about the selection of materials and determine the expected lifespan of their products.
Overall, the Xenon Arc Lamp Aging Test Chamber is an essential tool for quality control and product development in industries where prolonged exposure to sunlight can impact the performance and durability of materials and products.
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