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.

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

The use of natural rubber latex as a renewable and sustainable modifier of asphalt binder

2015 ◽  
Vol 18 (6) ◽  
pp. 547-559 ◽  
Author(s):  
Yong Wen ◽  
Yuhong Wang ◽  
Kecheng Zhao ◽  
Agachai Sumalee
Keyword(s):  
Natural Rubber ◽  
Asphalt Binder ◽  
Natural Rubber Latex ◽  
Rubber Latex

Natural rubber latex foam production using air microbubbles: Microstructure and physical properties

2020 ◽  
Vol 260 ◽  
pp. 126916 ◽  
Author(s):  
Sanit Sirikulchaikij ◽  
Rungrote Kokoo ◽  
Matthana Khangkhamano
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Foam Production

scholarly journals Pengaruh Konsentrasi Asam Sulfat (H2SO4) pada Hidrolisa Tongkol Jagung (Zea mays) Menjadi Nanokristal Selulosa sebagai Filler Penguat pada Produk Lateks Karet Alam

2019 ◽  
Vol 8 (2) ◽  
pp. 48-53
Author(s):  
Hamidah Harahap ◽  
Azwin Harfansah Nst ◽  
Ilhamdi Fujian Junaidi
Keyword(s):  
Sulfuric Acid ◽  
Natural Rubber ◽  
Physical Properties ◽  
Mechanical Test ◽  
Natural Rubber Latex ◽  
Spherical Shape ◽  
Rubber Latex ◽  
Hydrolysis Process ◽  
Cross Connect ◽  
Vulcanization Process

This research studied about the effect of concentrations sulfuric acid (H2SO4) on the hydrolysis process of corn cobs waste to manufacture of cellulose nanocrystal (NCC) which will be applied as fillers in natural rubber latex. This study began with a pre-vulcanization process of natural rubber latex at a temperature of 70 oC and followed by a vulcanization process at 110 oC for 10 minutes. The results of the testing of physical properties indicate that the higher amount of NCC loading will result in higher crosslinked denotes, while the results of testing the mechanical properties indicate that the maximum value is achieved at the loading of NCCs as much as 6 phr. The mechanical test results supported by the analysis of Scanning Electron Microscopy (SEM) showing the NCC have spread well. Characterization of the Transform Electron Microscope (TEM) shown  the resulting of NCC was spherical shape with the size of NCC produced for each concentration of sulfuric acid (H2SO4) 45%, 55%, and 65% respectively 57.65 nm; 28.43 nm; and 82.61 nm with an amount of each 0.849 g; 1,824 g; and 0.681 g. The mechanical and physical properties of the optimum natural rubber latex products occurred in the loading of nanocrystal cellulose with a number of 6 bsk, where the values ​​of cross-connect density, tensile strength, elongation at break, M200 and M300 were respectively 10.6234 2Mc-1x10- 5; 18.2 MPa; 780%; 2.23 MPa and 2.7 MPa.

Film from Mixtures of Natural and Synthetic Rubber Latex. Physical Properties

1952 ◽  
Vol 25 (4) ◽  
pp. 983-994
Author(s):  
R. M. Pierson ◽  
R. J. Coleman ◽  
T. H. Rogers ◽  
D. W. Peabody ◽  
J. D. D'Ianni
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Natural Rubber Latex ◽  
Synthetic Polymers ◽  
Rubber Latex ◽  
Stress Strain ◽  
Synthetic Rubber ◽  
Mooney Viscosity ◽  
The One ◽  
Rubber Stock

Abstract When tested in a single standardized procedure for cast latex films, the type of synthetic-rubber latex employed in latex blends containing 70 per cent or more natural-rubber latex had little effect on the stress-strain properties of the mixture. Cold-rubber latexes imparted higher stress-strain values to blends with natural rubber than did the corresponding hot-rubber latexes. The improvement was particularly noted on comparison of tensile product values. Low-conversion synthetic polymers produced higher stress-strain properties than high-conversion polymers in blends with natural rubber, even though their tensile strengths in 100 per cent synthetic stocks were approximately equal. Optimum physical properties were obtained by use of blends with synthetic polymers of medium Mooney viscosity. It is believed that the appearance of an optimum Mooney viscosity is tied in with the necessity of having quite high molecular weight on the one hand, and, on the other, the ability of the particles to knit well, the latter in turn requiring a comparative freedom from tight gel. Tensile product values increased with increasing styrene content in the synthetic polymer, but, correspondingly, the low-temperature stiffening increased. The physical properties of a natural rubber stock are far superior to those of any of the synthetic-rubber latexes tested to date. Cold-rubber latexes now in production are an improvement over high-temperature latexes, for example, in wet gel strength but do not approach natural rubber latex in stress-strain properties.

INVESTIGATION ON RUTTING PERFORMANCE OF NANOPOLYACRYLATE AND NATURAL RUBBER LATEX POLYMER MODIFIED ASPHALT BINDER MIXES

2016 ◽  
Vol 78 (7-3) ◽  
Author(s):  
Ekarizan Shaffie ◽  
Juraidah Ahmad ◽  
Ahmad Kamil Arshada ◽  
Dzraini Kamarun ◽  
Haryati Awang
Keyword(s):  
Natural Rubber ◽  
Asphalt Binder ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Nanocomposite Polymer ◽  
Modified Asphalt Binder ◽  
Stone Mastic Asphalt ◽  
Polymer Modified Asphalt ◽  
And Performance ◽  
Modified Binder

This paper discussed a research carried out to study the rutting performance of dense graded (AC) and Stone Mastic Asphalt (SMA) pavement using nanocomposite polymer modified binder. The study also focused on the determination of optimum proportion of additive to be used in the mixing process. Two types of asphalt binder with penetration grade, PEN 80/100 and performance grade PG 76 were added with nanopolyacrylate and natural rubber latex as asphalt modifier. The nanocomposite polymer modified binder was prepared by adding 6 percent of Nanopolyacrylate (NC) to the asphalt binder. Both SMA and AC asphaltic mixtures conformed to the Marshall volumetric properties criteria which indicate that these mixtures are durable. The Asphalt Pavement Analyzer ( APA) rutting test was performed to determine the rutting performance of AC and SMA asphaltic mixtures showed that the rut values for SMA14 mix varies from 0.8 mm to 1.9 mm and AC14 mix varies from 1.7 mm to 2.3 mm respectively. This indicates the beneficial use of Nanocomposite polymer as modifier especially on SMA14 mix.

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.

Effect of the vulcanization time and storage on the stability and physical properties of sulfur-prevulcanized natural rubber latex

2005 ◽  
Vol 97 (5) ◽  
pp. 1804-1811 ◽  
Author(s):  
K. K. Sasidharan ◽  
Rani Joseph ◽  
Shiny Palaty ◽  
K. S. Gopalakrishnan ◽  
G. Rajammal ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
The Stability ◽  
And Storage
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