橡胶混凝土的含气量及其控制方法_《混凝土与水泥制品》杂志社

摘要：试验研究了橡胶的粒度、掺量和粒形对橡胶混凝土含气量的影响。结果表明，混凝土的含气量随橡胶粒掺量的增加而明显增加，在橡胶粒掺量相同的情况下，当橡胶粒的粒度小于60目时，混凝土的含气量则随橡胶粒度的减小而增加。试验还表明，消泡剂能有效降低橡胶混凝土的含气量，显著提高混凝土的强度。据此，作者提出采用消泡剂来控制橡胶混凝土含气量的建议。

Abstract: The influences of size, dosage and shape of particle of recycled tire rubber on air content of concrete are researched by the tests. As the result, air content of concrete is obviously increased with the dosage of rubber. Under the same dosage of rubber and the size is less than 60# mesh, the air content of concrete can be increased with the size is increased. The experimental results also show that, air content of rubberized concrete can be effectively decreased by adding of the defoaming agent, which can also increase the strength of concrete obviously. So, it's suggested that the air content of rubberized concrete can be controlled by using of defoaming agent.

关键词:

橡胶混凝土；含气量；消泡剂

扫二维码用手机看

未找到相应参数组，请于后台属性模板中添加

（1）在橡胶粒度相同且其粒度较大（筛孔目数计不超过60）时，混凝土的含气量随橡胶粒掺量的增加而显著增加，且橡胶粒越细，混凝土含气量增加的幅度越大；当橡胶粒度较小（目数大于60）时，其掺量对含气量的影响规律有较大变化，会出现当掺量大于一定值后，含气量随橡胶掺量增加而减小的情况。在橡胶粒掺量相同的情况下，当橡胶粒度大于60目（目数小于60）时，混凝土的含气量随橡胶粒度的减小而增加；当橡胶粒度小于60目（目数大于60）时，混凝土的含气量随橡胶粒度的减小而减小。纤维状橡胶的掺量小于90kg/m³时，对混凝土的含气量没有影响。

（2）采用消泡剂能有效降低橡胶混凝土的含气量，显著提高混凝土的强度。

[1] 刘长. 中国轮胎资源循环利用行业发展及政策导向 [J]. 橡塑技术与装备，2008，34（3）：5-15.

[2] Nehdi M,Khan A. Cementitious composites containing recycled tire rubber: an overview of engineering properties and potential applications. Cem Concr Aggr, ASTM 2001,23(1): 3-10.

[3] H.A.Toutanji. The use of Rubber Tire Particles in concrete to replace Mineral Aggregate[J]. Cement&Concrete Composites,1996, 18(2): 135-139.

[4] llker Beki r Topcu. The Properties of rubberized concrete[J]. Cement and Concrete Research, 1995, 25: 304-310.

[5] N.LFattuhi, L.A.Clark. Cement-based materials containing shredded scrap truck tyre rubber[J]. Construction and Building Materials, 1996, 10(4): 229-236.

[6] Rostami, H. Lepore, J. Silverstraim. Use of recycled rubber tires in concrete. In Proc.Int.Conf. Concrete 2000, University of Dundee, UK, 1993, 391-399.

[7] Eldin.N.N, Senouci. Rubber-tire particles as concrete aggregate, ASCEJ, Mater, Civ.Eng, 1993, 5: 478-496.

[8] A.Benazzouk, K.Mezreb, GDoyen. Effec to rubber aggregates of physico-mechanical behaviour of cement-rubber composites-influence of the alveolar texture of rubber aggregates (J].Cement&Concrete Composites, 2003,25: 711-720.

[9] Ilker Bek i r Topcu. Assessment of the brittleness index of rubberized concretes[J]. Cement and Concrete Research, 1997, 27: 177-183.

[10] 袁琳. 橡胶集料钢筋混凝土构件受弯性能初探[D]. 硕士学位论文, 天津大学，2006.

[11] 郭灿贤，黄少文，徐玉华. 废旧轮胎胶粉改性水泥混凝土及其路用性能研究[D]. 硕士学位论文. 南昌大学，2006.

[12] 亢景付，任海波, 张平祖. 橡胶混凝土的抗裂性能和弯曲变形性能 [J]. 复合材料学报，2006，23（6）：158-162.

头部文案

橡胶混凝土的含气量及其控制方法

相关文件