乳化沥青的制备

针对沥青应用面广，但炼制污染大的状况，采用乳化方法使其软化、分散。即由固态不需加热而呈流体状态直接应用，减少大气污染、改善居民生活环境进行研究。制备成功环境友好的乳化沥青，可直接应用。     

乳化沥青的制备及其乳化剂对乳化沥青性能的影响

乳化沥青就是将沥青热融,经过机械的作用以细小的微滴状态分散于含有乳化剂的水溶液之中,形成水包油状的沥青乳液。使用这种沥青乳液修路时,不需加热,可以在常温下进行喷洒、贯入或拌和摊铺,铺筑各种结构路面的面层及基层,也可以用作透层油、粘层油以及用于各种稳定基层的养护。     

阳离子乳化沥青的现状及发展趋势

我公司生产的季胺盐是一种性能优良的阳离子沥青乳化剂。本文综述了阳离子乳化沥青现状和发展趋势,并结合公司的实际情况,提出了发展建议。     

乳化沥青的制备及其性能研究进展

综述了乳化沥青的研究进展,对乳化沥青的组成、制备方法及乳化机理开展了分析阐述,并系统地考察了乳化剂体系和制备工艺等影响沥青乳液性能的关键因素。基于目前发展现状,对未来乳化沥青的研究方向进行了展望。     

焦油沥青乳化生产燃料油

焦油沥青的产率占焦油的50%～60%,国外利用焦油沥青制备煤系针状焦、碳纤维和粘结剂等碳素材料.     

关于乳化炸药的发展趋势研究

我国研究乳化炸药有了近30年的历史,在生产、配置、安全管理等方面取得了很大的进步,也逐步形成了多系列的品种,满足了国内大部分的爆破工程的需求。但是随着经济全球化的趋势发展,国际上技术的交流,通过与国际上的先进的水平相比,我国还存在各方面的差距,一些工艺配方,成品炸药的缺陷制约着我国乳化炸药的发展。     

十八烷基酰胺乳化沥青的制备与应用

以十八烷基酰胺为沥青乳化剂改性盘锦90#沥青,制备了一种稀浆封层用乳化沥青,并对乳化沥青进行检测,所有指标均符合JTG F40-2004标准。把用本课题制备的乳化沥青应用在稀浆封层领域并在某道路上进行了应用,发现制备的乳化沥青对原路面上的细小裂缝有很好的修复作用。本试验研制的乳化沥青已经被抚顺嘉华筑路有限公司采用并实现了工业化,该企业年销量达200多t,销售额达700多万元,打破了进口乳化沥青的垄断,可以代替国外乳化剂。     

乳化沥青的性能及应用

通过对乳化沥青性能特点的介绍,论述了发展和推广乳化沥青的重要意义。     

脱硫胶粉在乳化改性沥青中的应用

考察了不同规格胶粉及不同脱硫程度的脱硫胶粉对橡胶改性乳化沥青性能的影响,结果表明,采用100目胶粉即可制备出橡胶改性乳化沥青,但乳化沥青的性能较差;采用活化度为50%左右的100目脱硫胶粉制备乳化沥青时,脱硫胶粉的用量相比于胶粉可大幅提高;在通过外掺100目50%左右活化度的脱硫胶粉(质量分数15%,以沥青计,下同)和质量分数2%的苯乙烯-丁二烯-苯乙烯嵌段共聚物改性的乳化沥青中添加质量分数1%的丁苯胶乳,所制备橡胶改性乳化沥青无筛上剩余物,5 d储存稳定性为2.9%,蒸发残留物的25℃针入度、软化点和5℃延度分别为55 (0.1 mm)、64.5℃和22.5 cm,能够满足乳化改性沥青的技术指标要求。     

阳离子乳化沥青选择性堵水室内研究

研制了一种具有高选择性封堵性能的阳离子乳化沥青堵剂SW-1.单岩心和双并联岩心驱替实验表明：SW-1能选择性进入水层,堵水率为97.8％,封堵强度达2.8 MPa/m,耐冲刷性好;而仅使油相渗透率下降8.9％,对油层伤害较小,具有较高的选择性封堵能力.     

掺RAP和乳化沥青的水泥混凝土力学性能研究*

在我国公路由建设向养护和改扩建转变的阶段,大量废旧沥青混合料（RAP）的处治和使用成为一大难题,同时水泥混凝土的原材料来源也在不断减少,因此,将废旧沥青混合料资源化并合理利用于混凝土的生产中,是缓解资源紧缺和实现绿色化工程的有效手段。本文将RAP和乳化沥青掺入水泥混凝土中,利用正交试验分析了RAP掺量、水灰比和乳化沥青掺量对水泥混凝土力学性能的影响。得出了各因素对水泥混凝土抗压性能的影响排序为水灰比>RAP掺量>乳化沥青掺量,对水泥混凝土抗折强度的影响排序为乳化沥青掺量>RAP掺量=水灰比。     

Study of long-term skid and wear resistance of waterborne epoxy resin-SBR compound modified emulsified asphalt microsurfacing

As an eco-friendly technology for pavement preventive maintenance, microsurfacing (MS) has the potential properties of cost-saving and excellent performance benefits in repairing distress. MS also improves the surface function, especially skid resistance, of old pavements that have gradually decayed under the coupled effects of long-term environment and loads. Reasonable assessments of the long-term skid and wear resistance of the MS can provide support for accurate decision-making on preventive maintenance, which in turn reduces maintenance costs and saves maintenance costs, and ensures traffic safety. To evaluate the long-term skid and wear resistance of MS in different natural and traffic environments, this paper investigated the change of British pendulum number (BPN), rutting depth, and mass loss rate of waterborne epoxy resin-SBR compound emulsified asphalt micro-surfacing (WER-SBR MEAMS) under different environmental factors and traffic conditions based on the self-developed accelerated loading abrasion instrument. The factors considered in the experiment include temperature, rainfall, UV radiation, speed, and load. The results showed that temperature and vehicle speed had a detrimental effect on the durability of WER-SBR MEAMS, which was more pronounced after 10,000 wear loading cycles. Reducing immersion time and slowing down the aging rate can improve the durability of WER-SBR MEAMS. Further, the influence degrees of different factors on the skid and wear resistance of MS were evaluated using the gray correlation method. From the results of the gray correlation analysis, the correlation coefficients between external variables and BPN, rutting depth, and mass loss rate are all greater than 0.8, which indicate that all the variables involved have relatively obvious and regular effects on the skid and wear resistance of WER-SBR MEAMS.     

Preparation and characterization of a novel magnesium phosphate cement-based emulsified asphalt mortar

To improve the efficiency of repairing asphalt pavements, a rapid-hardening magnesium-based cement emulsified asphalt (MCEA) mortar was developed. The effect of mix parameters on the properties of MCEA sample was systematically discussed, including asphalt to cement (A/C) ratio, asphalt and cement (S/(A+C)) ratio, water to cement (W/C) ratio, and MgO to phosphate (M/P) ratio, as well as the fresh properties, mechanical behavior and microstructure of MCEA sample were investigated. The results show that the initial setting time of MCEA paste is within 30 min, and the fluidity is 60–180 mm, which can effectively improve the efficiency of pavement repair engineering. Meanwhile, by adjusting the mix proportion parameters, the setting time and fluidity can be adjusted according to engineering needs. The compressive and flexural strengths of plain magnesium phosphate cement mortar reach 46.45 and 7.7 MPa, respectively, and they decrease with the increase of A/C, W/C, and M/P ratios. With the increase of S/(A+C) ratio, the area of emulsified asphalt encapsulated particles decreases, which improves the mechanical properties of MCEA mortar. Increasing the A/C ratio results in an increase in the residual MgO content and a decrease in the struvite content in the MCEA paste. Meanwhile, the residual MgO content in the MCEA paste prepared by the S-type emulsified asphalt is significantly lower than that of the N-type MCEA paste, which is related to the water content of the emulsified asphalt. In addition, the incorporation of emulsified asphalt also increases the porosity of the MCEA sample, but the N-type emulsified asphalt can play a role in refining the pore structure of the sample.     

阳离子沥青乳化剂的应用性能研究

以N-(2-羟基-3-十八烷基氨基)丙基三甲基氯化铵(A)、木质素季铵盐(B)和N-[2-羟基-3-十二烷氧基聚氧乙烯醚(9)]丙基三甲基氯化铵(C)为乳化剂制备了乳化沥青。对乳化沥青的性能测试表明,当乳化剂A,B和C单独使用的用量分别为乳化沥青总质量的0.5%,2.5%和2.5%时,乳液能够稳定存在5 d;当使用由乳化剂A和B或A和C以1∶1至9∶1的质量比组成的复配乳化剂,用量为乳化沥青总质量的0.5%时,制备的乳化沥青的稳定性明显地优于单独使用乳化剂A,B或C制备的乳化沥青。使用由乳化剂A和B以质量比2∶3组成的复配乳化剂,用量为0.5%时,所得到的乳化沥青的破乳时间为259 s;由A和C以质量比1∶1组成的复配乳化剂,用量为0.5%时,所得到的乳化沥青的破乳时间为223 s;而单独使用乳化剂A,用量为0.5%时,破乳时间仅为191 s。     

国内外金属茂聚烯烃现状及发展

介绍了金属茂催化剂的特点和应用以及国内外金属茂聚烯烃的开发动态。就我国金属茂聚烯烃的发展提出了建议。     

国内外硅肥研究与应用进展

综述了硅肥在国内外的研究及应用进展,阐述硅肥在农业生产中的十大作用,并针对我国的实际情况,介绍硅肥在我国的应用前景,提出硅肥的推广在我国大有可为。     

轮胎硫化设备及工艺研究进展

综述现阶段国内外轮胎硫化设备及工艺的研究进展。国内外轮胎硫化机的发展都经历了立式水压轮胎硫化罐、普通轮胎个体硫化机和轮胎定型硫化机3个阶段;液压式硫化机是现阶段轮胎硫化机的发展趋势,国外已全面推广,而国内机械式硫化机与液压式硫化机并存。硫化工艺则主要朝着高效节能的方向发展,加热方式已从蒸汽/过热水硫化过渡到氮气硫化,而硫化过程中摒弃胶囊的使用或采用刚性结构取代胶囊的作用也成为了研究热点。     

国内外乙二醇的市场现状及发展前景

乙二醇(EG)是生产聚酯的重要原料,文章分析了国内外乙二醇的生产消费现状及市场发展前景,提出了发展我国乙二醇生产的建议,即今后除扩大生产能力,积极开发新技术外,还应该积极拓展新的应用领域等,以促进我国乙二醇产业健康有序发展.