As the fiber - reinforced composite must has good ductility , first of all the mixing reinforcement of waste pe and pp were studied . the optimum mixture ratio was acquired with a little decrease of strength 鉴于纤维增强复合材料要求基体要有一定的韧性,首先研究了废旧pe和pp基体的共混增韧,获得在强度降低不大的情况下,增韧效果最好的共混组分的最佳共混比。
The author conduct a series of research work including the supporting system design , construction , monitoring and mixture ratio tests of mortar for anchoring in this research . some research results of applicable value in engineering are presented also 在本文的研究中,作者根据工程的自身特点对厦门市美仁宫大厦基坑围护工程的设计、施工、监测及锚固砂浆进行了一系列的研究工作,并得出了一些具有工程适用价值的成果。
The mechanical properties on one - directional loading of two kinds of mixture ratio rpc materials with or without steel fiber and of hollow steel tubes were studied . three kinds of loading format were analogized and the working mechanism of rpc filled in steel tube short columns 应用优化配比后的活性粉末混凝土,试验研究了掺与不掺钢纤维两种配合比rpc材料单轴抗压性能并与普通高强混凝土相比较,试验还研究了空钢管的力学性能。
Mixture mixing : install and debug the mixing equipment before construction , take the trial mix according to the mixture ratio , and find out the turning on location of every hopper strobe as well as the relation among material flow of every kind , draw up the curve , and if there is adjustment because of factors like material batch , difference of moisture content and so on , it need to be confirmed by the laboratory so as to ensure the mixture ratio of construction meet the design requirement 混合料拌和:施工前首先安装、调试好拌和设备,根据确定的配合比进行试拌,找出各料斗闸门开启位置与各种材料流量的关系,并绘制成曲线,如因材料批次、含水量不同等因素而调整,须由试验室确定,以确保施工配合比符合设计要求。
In order to investigate the influence of characteristics parameters on detonation wave in a two - phase pulse detonation engine model . the peak detonation pressures and average velocities of two - phase pulsed detonation wave produced by pde model using gasoline as fuel and air as oxidizer under various ignition frequencies and various mixture ratios are measured systematically , and the relations influencing them are analyzed 为了探索气-液两相脉冲爆震发动机模型内特征参数对产生爆震波的影响规律,系统地测试了以汽油为燃料、以空气为氧化剂的气-液两相脉冲爆震发动机模型在不同点火频率及不同余气系数下爆震波的峰值压力以及平均爆震波速,并对其变化进行了分析。