Rock wool board is made of rock wool fibers through cotton collection, bonding, paving, densification, curing molding and then pleating. The internal fibers of rock wool board have the characteristic of interlacing with each other, overall presenting the characteristics of low bearing capacity and high porosity. Rock wool insulation material refers to a high-strength light-weight and high-temperature resistant flame-retardant new type of natural light-weight fireproof inorganic synthetic insulation composite light-weight material. At present, rock wool board has completely been used as a new type of basic building material in China and directly applied in large quantities in the field of modern engineering construction. Rock wool board is another plate-shaped product made by adding thermosetting resin adhesive granules and water repellent mixed with appropriate amount of starch respectively when using high-pressure sandblasting or high-pressure blowing molten rock wool fibers, through high-temperature pressing, curing, cutting and forming etc. Building rock wool products generally have the following characteristics:
(1) Excellent fire protection (combustion performance Grade A);
(2) Good thermal insulation and sound absorption functions (thermal conductivity of rock wool board is generally less than 0.041 W/mK);
(3) Strong vapor permeability;
(4) Low water absorption;
(5) Excellent dimensional stability;
(6) Good chemical stability;
Rock wool external insulation system, with its high thermal insulation vapor permeability, high thermal insulation fireproof insulation performance, high thermal insulation sound insulation and sound absorption shock absorption performance, has been widely and successfully promoted and applied. It is currently the external insulation system with market share second only to EPS board insulation system, with cumulative building area exceeding 1 billion square meters. Rock wool board building external insulation and thermal insulation system is composed of a group of natural refractory rock wool sheet materials as the main refractory wall insulation material, placed on the inside and outside of the same building external wall. Basic parameters rock wool board external wall thermal insulation and insulation fireproof partition wall system components, generally require must be composed of thermal insulation fireproof rock wool, forming the thermal insulation protection interlayer, fireproof adhesive layer board and thermal insulation anchor bolts fixed between each insulation layer component, the plastering layer board outside the wall and the finish interlayer board inside and outside work together, constituting the entire external wall insulation thermal insulation thermal insulation protection interlayer board and other accessories; partition wall system accessory requirements also stipulate that must at least include a corner protector that should be prioritized when necessary, numbered as bracket and other accessories. Among them also includes a system with rock wool board outer layer as external insulation layer material, referred to as rock wool board external insulation layer system. Rock wool board is a product made by layers of fibers blown from molten igneous rock, through applying adhesive curing molding. Its fiber layers are parallel to the surface of the board. Although the use of pleating technology changes the planar structure of the fiber layers inside the rock wool board, making it form a wavy three-dimensional structure, relying on the hooking effect between fiber layers to improve the tensile strength of the rock wool board, but overall the tensile strength of rock wool board is the bonding strength between fiber layers. The main composition and system structure of insulation and finish layer materials in rock wool board mainly include: bonding layer, insulation layer, plastering layer, finish layer composition form and various structural accessories. Bonding layer material is mostly used as a kind of building structure attribution, is a layer of material between the building bottom layer material and under the building plastering layer material. The primary feature is that a polymer cementitious material can be used to firmly bond or combine and fix the upper and lower layers of materials on the building surface. Its building surface filler is two main material sources, organic and inorganic. The thermal insulation layer is a layer of uniform thermal insulation or thermal insulation sound insulation light-weight material layer laid on the outer wall of the boiler steam turbine shell and the outer wall of high-temperature steam turbine pipe walls and other main structural components and the outer surface wall of the boiler, in order to further take measures to avoid unit overheating shutdown and effectively reduce the large amount of chemical harmful gas heat released by the high-temperature steam turbine boiler or directly lose heat to the atmosphere of its workplace environment. The thermal insulation filler mainly filled inside is mostly high-quality natural rock wool fiber material, as well as some other various natural organic matter rich in a certain amount of moisture, moisture, and some other inorganic adhesives etc. Finish layer coatings should also consider selecting more light-weight insulation finish mortar, dotted gray paint layer etc. with special light-weight functionality.
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