A kind of alkali slag tunnel fireproof coating using composite activator and preparation method thereof
A technology of composite excitation and fireproof coating, applied in the field of tunnel fireproof materials, can solve the problems of long construction time and complicated construction process of tunnel fireproof coating, and achieve the effect of high bonding strength, good adaptability to low temperature environment and good application prospect.
Active Publication Date: 2019-11-12
FUZHOU UNIV
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Problems solved by technology
In actual engineering, tunnel fireproof coatings are generally sprayed in layers, and the spraying of the next layer needs to wait for the previous layer of paint to dry before proceeding, so it generally takes 12 to 24 hours at intervals, which makes the construction process of tunnel fireproof coatings Complex and long construction time
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[0024] The components of an alkali slag tunnel fireproof coating using a composite activator are calculated by weight percentage: dry material: 30% to 40% of slag, 4% to 6% of redispersible latex powder, 0.5% to 3% of polyvinyl alcohol, 0.5% to 3% of polypropylene fiber, 15% to 18% of expanded vermiculite, 13% to 16% of expanded perlite, 7% to 10% of sepiolite, 2% to 5% of hollow floating beads, and 3% of magnesium hydroxide ~6%, aluminum hydroxide 9%~12%; compound activator: neutral sodium salt 0.2%~3%, water glass 1%~6%; the sum of the weight percentages of the above components is 100%.
[0025] The polypropylene fibers have a diameter of 30 μm and a length of 6 mm. The neutral sodium salt is prepared with anhydrous sodium sulfate (analytical grade, purity 99%) and P.O42.5 ordinary Portland cement at a weight ratio of 6:4. Water glass adopts liquid water glass, wherein Na 2 SiO 3 33.7% solids, SiO 2 The solid content is 25.86%, Na 2 The O solids content is 7.84% and the...
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Abstract
The invention discloses an alkaline ore slag tunnel fireproof coating using a composite activator and a preparation method thereof. The alkaline ore slag tunnel fireproof coating is prepared from the following raw materials of dry materials (ore slag, redispersible latex powder, polyvinyl alcohol, polypropylene fiber, expanded vermiculite, expanded perlite, sepiolite, hollow float beads, magnesium hydroxide, and aluminum hydroxide) and the composite activator (neutral sodium salt and water glass). The preparation method comprises the following steps of firstly, dissolving the composite activator into water of which the weight is equal to 60% to 80% of dry materials, and preparing into a composite activator solution; adding the dry materials into a stirring pot, and slowly stirring for 3min; draining the composite activator solution into the dry materials by a glass bar, stirring for 5min, and uniformly mixing, so as to obtain the alkaline ore slag tunnel fireproof coating. The alkaline ore slag tunnel fireproof coating has the advantages that the adhering strength is higher, the fire-resistant property is better, the drying time is shorter, and the application prospect is better.
Description
technical field [0001] The invention belongs to the technical field of fireproofing materials for tunnels, and more specifically relates to a preparation method of an alkali slag tunnel fireproofing coating using a compound activator. Background technique [0002] With the vigorous development of tunnel engineering construction in our country, the research on tunnel fire prevention is also in full swing. When a fire accident occurs in a tunnel, it will cause serious consequences such as long interruption of driving time, extremely difficult rescue, and large economic losses. The damage is quite serious. Tunnel fireproof coatings have good development and application space because of their good fireproof effect, convenient construction and low cost. [0003] Alkali slag cement (cement made by using alkali activator to excite slag) has the following advantages: [0004] (1) Good fire resistance. Under high temperature conditions, ettringite produced by hydration of ordinary...
Claims
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IPC IPC(8): C04B28/00C04B111/28C04B111/20C04B111/76
CPCC04B28/006C04B2111/20C04B2111/28C04B2111/76C04B2201/20C04B2201/50C04B22/00C04B18/141C04B24/2623C04B16/0633C04B14/204C04B14/185C04B14/042C04B18/08C04B22/066C04B22/06C04B22/147
Inventor 季韬杨宇杨越凡陈旭涛徐靖怡吴孝琪
Owner FUZHOU UNIV