The Modification of Asphalt Emulsion Using Pre-Vulcanized Natural Rubber Latex for Highway Application

2010 ◽  
Vol 93-94 ◽  
pp. 639-642 ◽  
Author(s):  
Saovaros Malithong ◽  
Chanchai Thongpin
Keyword(s):  
Natural Rubber ◽  
Softening Point ◽  
Fire Hazard ◽  
Natural Rubber Latex ◽  
Optical Microscope ◽  
Asphalt Emulsion ◽  
Rubber Latex ◽  
Modified Asphalt ◽  
Swell Ratio ◽  
Asphalt Emulsions

Asphalt emulsion is manufactured by emulsification of asphalt, and it is an energy-saving, ecologically safe material because it does not need any heating processes which can emit gas and fire hazard in its use. The purpose of this study is to elucidate the feasibility on using pre-vulcanized natural rubber latex as an admixture for asphalt emulsion in order to improve thermal stability and useful mechanical properties of the asphalt emulsion. The crosslink density was determined by swell ratio. The effect of vulcanizing agent on residue properties of modified asphalt emulsions was studied. The morphology properties of the modified asphalt were also investigated by using an optical microscope. The results showed that asphalt emulsion which was modified using pre-vulcanized NR latex could provide a standard asphalt emulsion and applicable for highway construction application. The mechanical and physical properties of the dried asphalt emulsion were also very well modified by the vulcanized rubber phase. The residue properties of modified asphalt with natural rubber and pre-vulcanized natural rubber latex, including softening point and penetration was improved. The increase in vulcanizing agent could also increase softening point. At low polymer contents, the samples reveal the existence of dispersed polymer particles in a continuous bitumen phase, whereas at high polymer contents a continuous polymer phase was observed.

scholarly journals The Staining of Polymers

2002 ◽  
Vol 10 (5) ◽  
pp. 5-7
Author(s):  
Ronald W. Smith
Keyword(s):  
Electron Microscopy ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Optical Microscope ◽  
Hot Water ◽  
Polymeric System ◽  
Rubber Latex ◽  
Naturally Occurring ◽  
Contrast Mechanism ◽  
In The Beginning

In the beginning there was water-the first stain that delineated structure within a polymeric system. The polymerwas natural rubber (NR) and the system was an air-dried film of natural latex. Grenquist reported in 1929 that a dried film of natural rubber latex soaked in hot water became milky (Figure 1) and, at that stage, the latex particles could be detected by the optical microscope (OM), The contrast mechanism was provided by the absorption of water by the naturally occurring proteinaceous layers present on the congealed NR particle surfaces. There was little demand for polymer staining until the age of electron microscopy.

scholarly journals Perubahan Karakteristik Aspal Pen 60/70 dengan Substitusi Getah Karet Alam Pangkalan Balai, Sumatera Selatan

2021 ◽  
Vol 6 (3) ◽  
pp. 143
Author(s):  
Barkah Wahyu Widianto ◽  
Mochamad Isa Faishal
Keyword(s):  
Weight Loss ◽  
Specific Gravity ◽  
Natural Rubber ◽  
Softening Point ◽  
Natural Rubber Latex ◽  
Production Data ◽  
Test Results ◽  
Rubber Latex ◽  
Rubber Production ◽  
Asphalt Modification

ABSTRAKBerdasarkan data Produksi Karet di Indonesia terdapat peningkatan rata-rata 1,5% pada tahun 2015-2020, dimana produksi karet terbesar adalah Provinsi Sumatera Selatan yaitu 28,77%. Dengan peningkatan dan upaya pemanfaatannya maka dilakukan penelitian substitusi getah karet ke aspal. Getah karet yang digunakan adalah berbentuk padat dan berasal dari Pangkalan Balai, Sumatera Selatan. Penelitian ini bertujuan untuk mengkaji karakteristik aspal pen 60/70 disubstitusi dengan kadar getah karet alam 0%, 2,5%, 5%, dan 7,5%. Pengujian mengacu pada SE Menteri PUPR No 04/SE/M/2019. Hasil pengujian menunjukan nilai penetrasi, daktilitas, berat jenis, viskositas 135°C, kelarutan dalam TCE, TFOT, serta penetrasi dan daktilitas setelah kehilangan berat mengalami penurunan dengan ditambahnya kadar getah karet. Sedangkan nilai titik lembek, titik nyala, dan kehilangan berat mengalami peningkatan. Hal ini menunjukkan bahwa karakteristik aspal menjadi lebih keras dan diindikasi tahan terhadap deformasi tetapi rentan terhadap retak. Dari nilai pengujian disimpulkan bahwa kadar getah karet alam 5% memenuhi spesifikasi aspal modifikasi.Kata kunci: getah karet alam, aspal pen 60/70, aspal modifikasi ABSTRACTBased on Rubber Production data in Indonesia, there has been an average increasing of 1.5% for 2016-2020, where the largest production of rubber is South Sumatra Province, which is 28.77%. With the improvement and utilization efforts, research was carried out on mixing rubber sap into asphalt. The rubber sap that has been used is solid and comes from Pangkalan Balai, South Sumatra. This study aims to examine the characteristics of 60/70 pen asphalt substituted with natural rubber latex levels of 0%, 2.5%, 5%, and 7.5%. The test refers to SE Menteri PUPR No 04/SE/M/2019. The test results have shown the value of penetration, ductility, specific gravity, viscosity of 135° C, solubility in TCE, TFOT, penetration and ductility after weight loss has decreased with the addition of rubber sap content. Meanwhile, the values for softening point, flash point, and weight loss increased. This indicates that the characteristics of the asphalt become tougher and indicate that it is resistant to deformation but is prone to cracking. Judging from the test value, it can be concluded that the 5% natural rubber latex content meets the specifications of asphalt modification.Keywords: natural rubber, asphalt pen 60/70, asphalt modification

Natural Rubber Latex and Its Effects on Some Properties of Bitumen.

2020 ◽  
Vol 13 ◽  
Author(s):  
Osei T. ◽  
Tagbor T. A. ◽  
Awudza J. A.M.
Keyword(s):  
Specific Gravity ◽  
Natural Rubber ◽  
Physical Properties ◽  
Softening Point ◽  
Asphalt Binder ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Point Temperature ◽  
Aging Test ◽  
Ft Ir

: In Ghana, the main binder for asphalt roads is bitumen. However there are many cases of early road deterioration resulting sometimes from effects of temperature on asphalt binder (bitumen). For this reason several studies are on-going to develop bitumen suitable for the climatic condition in the country. This study examines some physical properties such as softening point temperature, viscosity, penetration temperature and specific gravity and chemical functionalities, peak intensity and new functional group of AC 10 grade bitumen modified with natural rubber latex (L) at levels between 1-5% and 10% as well as its effect on aging at 5 and 10% blends. Standard methods of determinations of the physical properties, Fourier Transform Infra-Red Spectroscopy (FT-IR) Test and Short term aging test were employed. Results indicated that upon addition of 1% natural rubber latex, all the properties tested decrease. Further increasing the percentage of natural rubber latex decreases penetration point but the softening point temperature, specific gravity and viscosity increases. Spectroscopy analysis result revealed that there was no change in peaks intensities of the blends as compared to the conventional bitumen. Aging test results indicated a change in mass of 0.112% for 5% blend and 0.152% for 10% blend. The study has shown that natural rubber could improve some properties of bitumen andcould be used for constructing more durable roads.

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