珍珠岩对氯氧镁无机胶合板性能的影响

Effect of perlite on properties of magnesium oxychloride inorganic plywood

为探究珍珠岩不同添加量对氯氧镁无机胶合板性能的影响,本研究采用单因素试验法,对制备胶合板的理化性能、内结合强度、阻燃性能等进行测试。研究结果表明:相较于未添加珍珠岩的空白样(P-0),添加珍珠岩后,制备胶合板的内结合强度均在0.5~0.6 MPa之间,表明珍珠岩添加量的增加对胶合板的内结合强度影响不大。当w(珍珠岩)=0.5%时(相对于总质量而言),制备胶合板浸渍剥离长度最小,改性胶合板耐水性能最好;当w(珍珠岩)=1.5%时,制备胶合板的静曲强度、弹性模量、端面握钉力和侧面握钉力分别提高到56.1 MPa、7 178.4 MPa、1 863.41 N和1 521.31 N,均达到峰值;当w(珍珠岩)=2.5%时,制备胶合板的阻燃性能最佳为668 s,相较于P-0组,胶合板阻燃时间延长98 s。此外,添加不同量珍珠岩制备的胶合板试件表面均未出现明显的返卤泛霜情况。

In order to explore the effect of different amounts of perlite on the properties of magnesium oxychloride inorganic plywood,the single factor experiment method was used to test the physical and chemical properties,internal bonding strength,flame retardancy of the prepared plywood.The research results showed that compared with the blank sample(P-0)without perlite,the internal bonding strength of plywood prepared with perlite was between 0.5 and 0.6 MPa,indicating that the increase of perlite addition had little effect on the internal bonding strength of plywood.When w(perlite)=0.5%(relative to the total mass),the immersion stripping length of the prepared plywood was the smallest,the modified plywood had the best water resistance.When w(perlite)=1.5%,the static bending strength,elastic modulus,end-face nail holding force and side-face nail holding force of plywood increased to 56.1 MPa,7178.4 MPa,1863.41 and 1521.31 N,respectively,all reaching peak values.When w(perlite)=2.5%,the best flame retardancy of plywood was 668 s,which was 98 s longer than that of P-0 group.Inaddition,the surface of plywood specimens prepared by adding different amounts of perlite had no obvioushalogenation and frost return phenomena.