硅烷白炭黑改性瀝青混合料穩(wěn)定性性能研究
發(fā)布時間:2018-09-12 09:26
【摘要】:瀝青路面由于其施工工藝簡單、養(yǎng)護維修方便、行車舒適性良好及開放交通時間短等優(yōu)點被廣泛應(yīng)用于公路建設(shè)中。近年來,隨著我國國民經(jīng)濟的飛速發(fā)展,人民的生活得到了普遍的提高,人們對于出行的舒適性、安全性要求也越來越高。瀝青路面是公路建設(shè)的主體,我國公路建設(shè)中有90%以上都是瀝青路面,因此瀝青路面的病害問題成為人們關(guān)注的焦點。南方地區(qū)夏季溫度高,最高可達到40℃,路面溫度可達到60~70℃,瀝青由于溫度過高表現(xiàn)出松軟、粘結(jié)力下降導(dǎo)致瀝青路面出現(xiàn)車轍、擁包等病害。東北地區(qū)冬季溫度過低,最低溫度可達到-30℃,,路面溫度可達到-40℃~-50℃,由于溫度過低,瀝青表現(xiàn)為脆性,東北地區(qū)每年因冰凍及春季凍融破壞的路面達70%左右。 論文經(jīng)過大量調(diào)查,針對瀝青路面夏季車轍、擁包,冬季低溫開裂等一系列病害問題,提出以硅烷白炭黑對瀝青進行改性以改善瀝青路面的高溫穩(wěn)定性、水穩(wěn)定性及低溫抗裂性能。 對于硅烷白炭黑的應(yīng)用,由于其粒度小、分散性好及疏水性等優(yōu)點,近年來廣泛應(yīng)用于橡膠、塑料工業(yè),同時由于其無色無毒,也被應(yīng)用在涂料、日用品化妝品等行業(yè)中。論文根據(jù)閱讀大量文獻,了解硅烷白炭黑優(yōu)缺點,將其加入基質(zhì)瀝青對其進行改性,了解其對路用瀝青上的影響。首先通過高速剪切儀加入不同摻量的瀝青進行針入度、軟化點、粘度等性能測試,通過測試結(jié)果確定硅烷白炭黑在瀝青中的最佳摻量。其次,通過瀝青性能試驗測試出的硅烷白炭黑最佳摻量,對其進行老化及化學(xué)驗證,主要通過瀝青老化、水煮試驗及Tg分析試驗確定硅烷白炭黑改性瀝青的粘附性、老化性能及化學(xué)性能的優(yōu)越性,為硅烷白炭黑改性瀝青在路用性能上的研究奠定基礎(chǔ)。最后,通過對硅烷白炭黑改性瀝青混合料穩(wěn)定性進行研究,將基質(zhì)瀝青混合料及硅烷白炭黑改性瀝青混合料路用性能進行對比,主要包括:馬歇爾穩(wěn)定度試驗、浸水馬歇爾及真空飽水馬歇爾試驗、凍融劈裂試驗、車轍試驗。通過實驗研究確定硅烷白炭黑改性瀝青混合料的路用性能較基質(zhì)瀝青混合料有很大程度的改善,從而為硅烷白炭黑改性瀝青混合料在公路建設(shè)中的應(yīng)用提供理論基礎(chǔ)。 硅烷白炭黑應(yīng)用在瀝青路面充當(dāng)改性劑是一種新型材料,論文主要通過瀝青及瀝青混合料的常規(guī)試驗及化學(xué)試驗對其進行分析驗證,通過試驗得出硅烷白炭黑在瀝青混合料的高溫穩(wěn)定性及水穩(wěn)定性有很好地改善,對其低溫抗裂性能研究改善效果不是特別明顯,但低溫抗裂性能試驗研究較少,瀝青化學(xué)、物理性能有待進一步研究。
[Abstract]:Asphalt pavement is widely used in highway construction because of its simple construction technology, convenient maintenance, good driving comfort and short open traffic time. In recent years, with the rapid development of China's national economy, people's life has been generally improved, people for travel comfort, safety requirements are also increasing. Asphalt pavement is the main body of highway construction, more than 90% of the highway construction in China are asphalt pavement, so the problem of asphalt pavement disease has become the focus of attention. The summer temperature in southern China is high, the highest is 40 鈩
本文編號:2238594
[Abstract]:Asphalt pavement is widely used in highway construction because of its simple construction technology, convenient maintenance, good driving comfort and short open traffic time. In recent years, with the rapid development of China's national economy, people's life has been generally improved, people for travel comfort, safety requirements are also increasing. Asphalt pavement is the main body of highway construction, more than 90% of the highway construction in China are asphalt pavement, so the problem of asphalt pavement disease has become the focus of attention. The summer temperature in southern China is high, the highest is 40 鈩
本文編號:2238594
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