胶乳改性乳化沥青性能试验研究

实验室内通过添加不能掺量的SBS胶乳和SBR胶乳分别制成改性乳化沥青。分别考察了筛上剩余量、恩格拉粘度、储存稳定性以及残留物的软化点、延度等几项主要指标随胶乳掺量变化的情况。SBS胶乳和SBR胶乳在对乳化沥青高低温性能的改善上各有侧重,建议在对高温性能要求较为严苛的地区使用SBS胶乳改性乳化沥青,而在对低温性能要求较为严苛的地区使用SBR胶乳改性乳化沥青。     

环氧树脂改性乳化沥青冷补混合料的研究

对常温式环氧树脂改性乳化沥青及其混合料的性能进行了研究。基于目前国内冷补沥青混合料的研究现状,采用经验法和马歇尔实验的方法对环氧乳化沥青冷补混合料的施工性能、初始强度、成型强度、水稳定性进行了分析。结果表明：环氧树脂改性乳化沥青可以用于配制路面冷补混合料而且性能优异。     

超分子紫外阻隔材料改性沥青的研究与应用

采用超分子紫外阻隔材料制备了路用耐老化沥青和屋面防水用耐老化沥青,研究了超分子紫外阻隔材料对基质沥青和SBS改性沥青物理性能和老化性能的影响。结果表明超分子紫外阻隔材料可显著改善基质沥青和SBS改性沥青的耐紫外光老化性能,并明显提高沥青混合料的抗车辙能力。     

The rheological behavior of bitumen and moisture susceptibility modified with SBS and nanoclay

The effect of styrene–butadiene–styrene (SBS) and nanoclay additive on performance of pure bitumen and stone matrix asphalt (SMA) mixture was investigated. Different samples with various percentages of nanoclay (2%, 3%, 4%, and 5%) and SBS (0% and 5%) by weight of bitumen were prepared, and the rheological and chemical behavior of bitumen (rotational viscosity, dynamic shear rheometer, SEM, and FTIR), the indirect tensile strength and moisture susceptibility of different mixtures were evaluated. Based on the results, using nanoclay and SBS polymer can improve the rheological behavior of base binder and the resistance of SMA mixtures against moisture damage.     

Evaluation of rutting resistance of asphalt binders and asphalt mixtures modified with polyphosphoric acid

In this research, a polyphosphoric acid (PPA) additive was used to modify a performance graded binder (PG 58-22). Experimental program included use of three PPA contents (0.5%, 1%, and 1.5%) by weight of bitumen and use of antistripping limestone aggregates. High-temperature rheological properties of asphalt binders were evaluated through the frequency sweep test. Complex modulus test was also used to evaluate rutting characteristics of asphalt mixtures. Results showed that PPA significantly improved rutting resistance of both unmodified asphalt binder and unmodified asphalt mixture, especially for the asphalt binder.     

SBS改性沥青质量影响因素探讨

从基础沥青、苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）加入量、SBS化学结构、相对分子质量、嵌段比、凝胶含量、膨化度等方面分析了原料对改性沥青性能的影响。并指出提高SBS改性沥青性能的主要措施为SBS的加入量控制在4％～6％；并根据基础沥青的芳香分含量调整SBS的嵌段比等。     

阻燃环保沥青的开发及性能评价

通过向SBS改性沥青中添加无机阻燃剂的方法开发了阻燃环保沥青,并对SBS改性沥青和阻燃环保沥青进行了胶结料和混合料的性能试验。结果表明：阻燃环保沥青的常规性能与SBS改性沥青相比变化不大,而氧指数得到了较大的提高,较好地改进了阻燃性能。对SBS改性沥青及阻燃环保沥青混合料进行了车辙试验、小梁弯曲试验、水稳定性试验等,结果表明：阻燃环保沥青混合料的路用性能与SBS改性沥青相当。同时,模拟燃烧结果表明,阻燃环保沥青有效改善了沥青混凝土的阻燃性能。     

Preparation of an SBS Latex–Modified Bitumen Emulsion and Performance Assessment

Abstract

For resolving the contradiction of the stability between styrene-butadiene-styrene (SBS)-modified bitumen emulsion and the concentration of SBS, a method of preparing SBS latex is provided in this article. Results showed that SBS latex had good stability properties and performance. The effect of emulsifier concentration on the storage stability showed that the maximum stability of SBS latex–modified bitumen emulsion (SBS-LMBE) was obtained at emulsifier weight concentration 1.0% and addition of SBS latex to bitumen emulsion enhanced the difficulty of emulsification. The effects of SBS latex on bitumen properties showed the penetration decreased, whereas the softening point and ductility at 5°C increased, which means that SBS latex plays a role in improving the properties of bitumen. Compared to the base bitumen, saturate and aromatic of evaporation residue of SBS-LMBE decreased. However, resin and asphaltene increased. Analysis of the relationship between the components and properties of bitumen showed that the components change caused by SBS latex was beneficial to the properties of bitumen. The colloidal index (CI) showed that SBS latex also made the colloidal system more stable.     

乳化改性沥青防水涂层的研究

本实验将0.1μm～5μm的沥青微粒分散到由复合乳化剂所配制的乳液中,从而制得乳化沥青,再向乳化沥青中加入一定量的SBS胶乳,混合搅拌制得乳化改性沥青,并对其各项指标进行测定。当取沥青质量为50g时,由HLB值相近原则,取水250g,SDS阴离子乳化剂0.64g,OP-10非离子乳化剂8.36g,制得相对稳定的乳化沥青。随后,逐渐加入SBS胶乳,随着SBS胶乳加入量的增大,乳化改性沥青的性能逐步得到提高。当SBS胶乳质量百分含量达到7%时,软化点、针入度和延伸度均达到较好的水平。     

Rheological properties of Deurex – modified WMA binder containing SBS

Recently, warm mixture asphalt (WMA) technologies drawn much attention for their benefits to environment and workability. Deurex is novel type of warm mixture asphalt additive, which is extracted from sugar cane. The objective of this study is to experimentally investigate the effect of Deurex on SBS modified asphalt. The Deurex was blended into SBS modified asphalt at the dosages of 2%, 3% and 4%. Physical properties tests including penetration, soft point and ductility, dynamic shear rheometer (DSR), and bending beam rheometer (BBR) tests were carried out. The test results showed that the increase in Deurex additive could significantly reduce the viscosity of SBS modified asphalt, which indicates that the Deurex can serve as an effective type of warm mixture asphalt additive. In addition, the results showed that the addition of Deurex can enhance the high temperature properties while lower the low temperature performance of SBS modified asphalt. However, as long as the Deurex dosage is not higher than 3%, the low temperature grade of WMA binder keep the same as the control binder.     

液体SBS改性乳化沥青微表处应用技术

液体SBS改性乳化沥青技术，工艺简单、对设备要求低、能耗少，并可大大减轻沥青及SBS的老化，其混合料优越的高低温及抗湿滑性能，可大大增强路面的耐久性，延长了路面的使用寿命。施工过程中成功应用抽提、现场粘聚力、层间结合力等试验方法，对施工质量进行监控，使得该项技术更加完善。     

不同类型SBS的改性效果

结合中国石化茂名分公司改性沥青的生产,着重介绍了茂名分公司合成橡胶事业部生产的三种规格道路改性用SBS的实际应用情况,结果表明：三种改性剂均可生产出满足交通部JTGF40--2004《公路沥青路面施工技术规范》要求的SBS改性沥青产品。     

回收聚乙烯蜡降粘SBS改性沥青的探索

研究了回收聚乙烯蜡对SBS改性沥青和基质沥青的改性效果,比较了回收聚乙烯蜡与Sasobit对沥青的改性效果。结果表明回收聚乙烯蜡降低了沥青的高温粘度,具有很好的低温施工性,同时提高了沥青路面的高温使用性能,回收聚乙烯蜡作为有机降粘剂具有很好的应用前景。     

SBS改性沥青机理研究

通过分析SBS改性沥青的红外光谱谱图、组分分布、DSC谱图。考察储存和加工工艺参数对SBS改性沥青性能稳定性的影响，深入探讨了聚合物改性沥青的机理。认为沥青改性以物理改性为主；SBS颗柱易吸收沥青中的饱和分，溶胀后的SBS极性与胶质相似；SBS颗粒与沥青有不完全相容性，SBS颗粒与沥青组分的亲和作用对沥青的相态转变产生影响；沥青组分对SBS的溶胀与吸附是一个动态的过程，它是沥青新胶体体系的形成和沥青聚集态结构改变的基础，这种动态过程对聚合物改性沥青的性能有很大影响。     

Effect of nanoclay on performance of neat and SBS-modified bitumen and HMA

The aim of this research was to investigate impact of nanoclay on rutting and moisture damages resistance of neat and SBS-modified asphalt binder and mixture. 4% SBS was blended with 2% nanoclay and 6% nanoclay was used and compared with neat and 4% SBS-modified asphalt binder and mixes. Results of performing rotational viscosity, dynamic shear rheometer, repeated creep recovery, indirect tensile strength, and dynamic creep tests indicated nanoclay has positive impact on rutting and moisture damages resistance of neat and modified asphalt binder.     

节能高强改性沥青混合料路用性能试验研究

以SBS改性沥青为粘结料,按照马歇尔配合比设计原理得到AC-16改性沥青混合料在目标空隙率（VV）下的最优级配（J）和最佳油石比（Pa）。保持最优级配（J）和最佳油石比（Pa）不变以节能高强改性沥青为粘结料分别成型若干组马歇尔试件,测定不同击实温度下混合料的体积指标和力学性能,获得节能高强改性沥青混合料AC-16达到相同空隙率（VV）时的最佳击实温度（T）。对两种沥青混合料分别进行路用性能全面对比试验,结果表明：在同等压实条件下节能高强改性沥青混合料温拌效果显著,其中高温稳定性能比SBS改性沥青混合料至少提高1倍且其他路用性能接近SBS改性沥青混合料。     

Evaluation of properties of Trinidad Lake Asphalt and SBS-modified petroleum asphalt

The properties of Trinidad Lake Asphalt (TLA) and SBS compound modified petroleum asphalt were investigated. Results show that the compound of TLA and SBS exhibits a remarkable combined effect on enhancing the deformation resistance of asphalt, and SBS can offset partial negative effect of TLA on the creaking resistance of asphalt, which will extend the applicable area of TLAMPA. FTIR and TG curves indicate TLA and SBS are physically mixed into petroleum asphalt and have little influence on the thermal stability. TLA and SBS also exhibit combined effect on improving anti-aging performance of asphalt, which would extend the service life of pavement.     

The effect of nano-SiO2 and the styrene butadiene styrene polymer on the high-temperature performance of hot mix asphalt

The production of modified asphalt mixtures with appropriate performance in high temperature has always been under the attention of researchers. One of these modifiers is Styrene Butadiene Styrene (SBS) polymer. Since the application of SBS polymer in bitumen and asphalt mixture does not have expected performance of field due to phase separation of bitumen and polymer, oxidation, and aging, the present study tries to not only improve the polymer defects, but also analyzes its high-temperature performance by using nano-SiO₂ and SBS polymer in bitumen modification. According to the study results, adding nano-SiO₂ and SBS polymer with 3 and 4.5 bitumen weight percent, respectively, to bitumen in asphalt mixture leads to an increase of flow number in dynamic creep test at 50°C for 399 times and at 60°C for 1,015 times compared to unmodified asphalt mix. This, in turn, indicates the considerable improvement of asphalt mixture high-temperature performance.     

Effect of C9 petroleum resins on improvement in compatibility and properties of SBS-modified asphalt

Various amounts of C9 petroleum resin (PR) were added to the starting materials for the preparation of low 4% and 8% SBS content polymer modified asphalt (PmA). Morphology, physical properties and rheological performance of each SBS-PmA are investigated by using fluorescence microscope (FM), routine tests and dynamic shearing rheometer (DSR). Routine tests and DSR results reveal that high-temperature performance of PmAs are markedly improved by using a proper content of C9 PR, especially for SBS-PmA with 8% SBS content. FM results show that incorporation of C9 PR is beneficial to the dispersion behavior of SBS in asphalt binder.     

SBS改性无卤阻燃沥青的研制

以辽河AH-90沥青为基质沥青,苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）为改性剂,聚磷酸铵、季戊四醇、聚二甲基硅氧烷、Mg（OH）2、Al（OH）,按质量比2：3：2：1：1配制成复合阻燃剂,并采用LKJ—II型沥青调和剂,制备出SBS改性无卤阻燃沥青。性能评价结果表明,所制备SBS改性阻燃沥青的主要理化性质符合JTGF40-2004标准的要求;在复合阻燃剂加入量（占基质沥青的质量分数）为15％时,其氧指数为31．5％,烟密度为37．44,烟气毒性等级达到ZA1。