Microcellular foamed modified glazed hollow bead insulating mortar and preparation method thereof

Abstract

The invention belongs to the field of building materials, and relates to microcellular foamed modified glazed hollow bead insulating mortar, which is prepared in a microcellular foaming way according to a synergistic effect between an air entraining agent and an efficient water reducing agent. The microcellular foamed modified glazed hollow bead insulating mortar is prepared from an inorganic gelled material, pulverized fuel ash, ash calcium powder, dispersible rubber powder, hydroxy-propyl methyl cellulose ether, an air entraining agent, a water reducing agent, wood fibers, polypropylene fibers and glazed hollow beads. According to the microcellular foamed modified glazed hollow bead insulating mortar, the thermal conductivity coefficient of mortar is lowered effectively, and the mechanical performance of the mortar is enhanced to a certain extent; and higher construction volume yield can be achieved for the mortar, the dispersity and workability of the mortar can be enhanced, and convenience is brought to construction. The invention further discloses a preparation method of the microcellular foamed modified glazed hollow bead insulating mortar. Due to the adoption of the preparation method, the breakage rate of glazed hollow beads in the preparation process of the insulating mortar can be lowered effectively, and the use effect of the glazed hollow bead insulating mortar is enhanced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to thermal insulation mortar for building wall energy saving, in particular to a kind of porous inorganic matter-vitrified microbeads as thermal insulation medium, in order to obtain micro-foaming modified vitrified mortar with good energy-saving effect Microbead thermal insulation mortar and a preparation method thereof. Background technique [0002] The fatal performance deficiency of organic wall insulation materials (except rigid foam phenolic boards) that have been widely used in China is the low level of flammability and flame retardancy, and the implementation of flame retardancy is difficult and the cost of flame retardancy is high. Especially when this type of material is burned, the smoke density is high, and a large amount of toxic and harmful gases are produced, causing personal injury. Since the large-scale application of organic wall insulation materials in C...

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Problems solved by technology

[0008] The thermal conductivity of vitrified microbead thermal insulation mortar sampled and tested on large-scale engineering sites is mostly above 0.08 (W / m k), up to 0.09 (W / m k) and above, which is comparable to the thermal conductivity reported by enterprises The main reasons for the large difference are: 1. The bulk density of vitrified microbeads varies greatly, the low one is 80kg / m3, the high one is 160kg / m3, or higher, and the thermal conductivity of vitrified microbeads has a linear relationship with the bulk density. Insulation mortar with low thermal conductivity can be obtained by using vitrified microspheres with low bulk density, but in the actual industrial production of vitrified microspheres, the proportion of vitrified microspheres with a bulk density of 80kg / m3 is very low, and the amount is only It can be used for laboratory testing or sample preparation. The bulk density of most vitrified microbeads is 110-120kg / m3 or higher, and the thermal conductivity of its mortar products will inevitably increase.

Second, vitrified microbeads usually have to be transported long distances from the place of origin to the application site, and transportation will cause damage to vitrified microbeads. In addition, the production process of vitrified microbead insulation mortar and the process of adding water and mixing at the construction site can also cause vitrified microbeads. The further damage of the vitrified microbeads will lead to the increase of the bulk density, which will eventually lead to a significant increase in the thermal conductivity of the vitrified microbead thermal insulation mortar when it is applied to the construction wall, thereby reducing its energy-saving effect

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