scholarly journals Efecto de la temperatura en el módulo dinámico del cemento asfáltico y la mezcla asfáltica – caso de Boyacá

Respuestas ◽  
2016 ◽  
Vol 21 (1) ◽  
pp. 108
Author(s):  
Carlos Hernando Higuera-Sandoval

Objetivo: El presente artículo muestra de manera detallada el efecto de la temperatura en la determinación del módulo dinámico del cemento asfáltico y el módulo dinámico de la mezcla asfáltica. Metodología: Para la investigación se consideraron las temperaturas medias anuales ponderadas más representativas de las regiones del departamento de Boyacá de 13°C a 20°C, también la velocidad de operación de sus carreteras de 30, 50, 70 y 100 Km/hora y se analizaron dos cementos asfálticos del tipo AC 60 – 70 y AC 80 – 100, estipulados en el artículo INV 400-13 de las especificaciones generales de construcción de carreteras del Instituto Nacional de Vías – INVIAS - 2013 y que son de uso frecuente en la construcción de pavimentos en el departamento de Boyacá. Para la determinación de los módulos dinámicos del asfalto y de la mezcla asfáltica se siguió la metodología de la SHELL y se analizaron las variables como la temperatura media anual ponderada del aire – TMAP, la temperatura de trabajo de la mezclas – tmix, la velocidad de operación de las carreteras – Vop, el tiempo de aplicación de la carga – t, la frecuencia de la aplicación de la carga – F y el índice de penetración del asfalto – IP. Resultados: Se presentan los módulos dinámicos del asfalto y de la mezcla asfáltica para diferentes temperaturas medias anuales ponderadas y diferentes velocidades de operación de las carreteras del Departamento de Boyacá, para los asfaltos tipo AC 60-70 y AC 80-100. Conclusión: El aporte de este trabajo de investigación es de gran utilidad para los ingenieros de diseño de estructuras de pavimentos, porque permite conocer el módulo dinámico de una mezcla asfáltica densa en caliente tipo INVIAS MDC-19 para rodadura, teniendo en cuenta la temperatura media anual ponderada de la zona del proyecto y las características de operación de la carretera, variables fundamentales para el diseño de las estructuras de pavimento flexible.Abstract Objective: This article shows in detail the effect of temperature on the determination of the dynamic module of asphaltic cement and the dynamic module of the asphalt mix. Method: Average pondered annual temperatures of the most representative Regions of the department of Boyaca ranging 13 ° C to 20 ° C were considered, as well as the speed of operation of its highways 30, 50, 70 and 100 km / hour and were considered, and two asphalt cements the type AC 60 - 70 and AC 80 – 100 which are stipulated in the article INV 400-13 of the general speciications for road construction of the National roads Institute - INVIAS - 2013 of frequent use in the pavement construction in the department of Boyaca. For the determination of the dynamic modules of asphalt and asphalt mixture the methodology SHELL was followed and variables as the weighted average annual air temperature TMAP, temperature Working Mixtures - TMIX, Speed Operation of roads - VOP, the application time load - t, the frequency of application of the load - F and the rate of penetration asphalt - IP were analyzed. Results: Dynamic modules asphalt and asphalt mixture paragraph for different annual pondered average temperatures and different speeds of operation of the roads on the Department of Boyaca are presented, for asphalts type AC 60-70 and AC 80-100. Conclusion: The contribution of this research work is very useful for Design Engineers of pavement structures as it allows to know the dynamic module of a hot-dense asphalt mixture of the type INVIAS MDC-19 for rolling, taking into account the annual pondered average temperature of the project area and the operating characteristics of the road, fundamental variables for the design of lexible pavement structures.Palabras clave: Diseño de pavimentos lexibles, mecánica de pavimentos, mezclas asfálticas, módulos dinámicos

2014 ◽  
Vol 587-589 ◽  
pp. 1141-1144
Author(s):  
Xu Bing Bi

In this study, contrasted rubber modified asphalt and SBS modified asphalt, the mixture of AC-13C, SMA-13 and AR-AC13 are used for compaction test in the range of 120~200 °C as to covering the actual road construction compaction temperature. It can simulated the road compaction performance.The results showed that the temperature is a great influence on the volume parameter of rubber modified asphalt mixture. In the range of 160~180 °C, the void fraction, VMA and VFA of modified asphalt mixture is not sensitive to temperature, improving mixing temperature is not meaningful to improve the quality of compaction. When the temperature dropped to below 160 °C, the VMA rise rapidly, VFA falling rapidly, the increase of void fraction also present a "linear" trend, at this stage to improve mixing temperature can improve the compaction quality.


2018 ◽  
Vol 196 ◽  
pp. 04026
Author(s):  
Sergey Sannikov ◽  
Sergey Kuyukov ◽  
Alexey Zamyatin ◽  
Alexandr Zhigailov

The paper presents a complex method for increasing water resistance and reducing crack formation by using a prefabricated foundation of soil-cement slabs with surface processing with a hydrophobizing material on basis of organosilicon compounds. Theoretical, laboratory and full-scale experimental studies were made. Theoretical studies are based on the substantiation of the geometric parameters of the slab in order to exclude the probability of its destruction under its own weight during building and installation works. The result of the first stage of laboratory studies is the determination of the optimum composition of soil-cement mixture in order to achieve a grade of strength M20. At the second stage, the effectiveness of the influence of hydrophobizing materials "Tiprom U" and "Penetron-Admix" on water absorption and compressive strength of soil-cement was determined. The final stage of the research was a full-scale experiment. In the factory environment, soil-cement slabs were manufactured in metal forms. Based on the results of the research, conclusions about the effectiveness of this complex method were made. The use of soil-cement slabs allows reducing crack formation, as well as to work all year round due to manufacturing and surface treatment of slabs in the factory conditions.


Jurnal CIVILA ◽  
2018 ◽  
Vol 3 (2) ◽  
pp. 154
Author(s):  
Errine Yulia Rizqi Intanti ◽  
Zulkifli Lubis

In Indonesia, the road construction has experienced a fairly good development. From a wide range of road constructions, flexible pavement is the most chosen one because its characteristics: easy, fast, and efficient. However, flexible pavement has many weaknesses, for example the premature damage on the road surface after some time passed by the traffic so that the road cannot reach the planned age. For that, it is done a research to add a hot asphalt mixture material that aims to improve the quality of the mixture results. The selected ingredient is natural water hyacinth. The method used is trial and error with reference of SNI 03-1737-1989. Variations used are 2%, 4%, 6%, 8% and 10% of the asphalt weight, asphalt level used is 5.72 %. Of the 5 variations of mixture used on Type XI Asphalt Concrete Layer, it is obtained the result that the water hyacinth fiber level which has the best score and meet the specifications of SNI 03-1737-1989 is on the percentage of 6% which obtained from calculation data using graphs and regression model where Marshall Stability is equal to 644,46 Kg, flow 3,39 mm, VMA (voids in the mineral aggregate) is equal to 13,83 %, VFWA (voids filled with asphalt) is equal to 65,35%, VIM (voids in the mix) is equal to 2,52 %, density of 2.31 gr/cc, and Marshall Quotient of 164.03 Kg / mm.


2019 ◽  
Vol 27 (3) ◽  
pp. 21-28
Author(s):  
Silvia Cápayová ◽  
Zuzana Štefunková ◽  
Stanislav Unčík ◽  
Andrea Zuzulová

Abstract Pavement structures, layers, and parameters must meet the strict requirements of applicable standards and regulations. The thickness of layers and the choice of materials depend on the factors involved, i.e., the traffic load and climatic factors (changes in temperature, water, rain, snow); they are also dependent on the geological environment at the road construction site and the parameters and properties of the embankment (the subgrade of the pavement). In some cases, the capacity of the existing transport infrastructure is on the edge of sustainability. The increase in the traffic load and the use of lower-class roads by freight transport, together with insufficient maintenance, has resulted in a deterioration of road conditions, thereby causing many deficiencies and failures. The required serviceability and operational performance of roads can be ensured by the choice of suitable quality materials and technological construction processes. Technologies that are environmentally acceptable and economically efficient should be preferred.


2021 ◽  
Vol 1209 (1) ◽  
pp. 012078
Author(s):  
J Bokomlasko ◽  
J Mandula

Abstract Asphalt mixture is a building material with many advantages. Therefore, it is most used in road construction. If the asphalt mixture is laid with the prescribed technology, it can withstand load effects to long-term. It is necessary to take samples that will be subjected to laboratory measurements. There are several laboratory test, for example measurement thickness of the asphalt mixture layers, the aggregate fraction, quantity of binder in the mixture, determination of air void in asphalt mixture layers. Samples taken directly from the construction site are subjected to laboratory tests. This article focuses on one of the laboratory tests and it is determination of air void in asphalt mixture layers. The determination of air void in asphalt mixture layers is test in detail, because this effect has influence on the deformation properties of asphalt mixture layers. Therefore, it was necessary to model of air void in asphalt mixture layers with different degrees air void. On this purpose was use program Abaqus. The results were plotted. This graphs showed that increasing the air void in asphalt mixture layers has effect on the expansion of deformations. This can lead to faster pavement degradation.


2011 ◽  
Vol 374-377 ◽  
pp. 1511-1514
Author(s):  
Yang Guo ◽  
Ying Hua Zhao

Fiber reinforcement as an available attempt has been proved to be effective in improving the toughness of asphalt concrete and is becoming a new method for highway maintenance. When fiber modified asphalt mixture is used as the surface course of a reconstructive pavement, the interface bonding property between top and lower layers seems to become a crucial factor in the road performance of the long lasting pavement. The primary objective of the research is to study the influence of fiber inclusions on the interfacial shear property of the pavement. With the purpose of discussing the shear strength of the interface between Bonifiber modified asphalt mixture top layer and the normal asphalt mixture layer,the laboratory shear test was developed on MTS-810. Four kinds of double-layered cylindrical specimens were made to simulate the different pavement structures. Test results show that the overlaying with Bonifiber modified asphalt mixture improves not only the general road performance but also the interface property. It is concluded that, the interface property of pavement with fiber reinforced top layer behaves much better than that with normal asphalt concrete one.


Author(s):  
Sena Kuswara* ◽  
Bagus Hario Setiadji ◽  
Jati Utomo Dwi Hatmoko

In pavement structures that are often submerged by water, the damage to pavement is often caused by the loss of bonds or adhesions between the aggregate and asphalt, the type of damage that occurs due to the loss of adhesion between the aggregate and asphalt is the exfoliation of asphalt granules so that the road is cracked and corrugated. To reduce the release of aggregate granules and improve the bond between aggregates and asphalt can be made with the addition of anti-exfoliating additives or antistripping agent additives. This study aims to analyze the performance of wear-coated concrete asphalt mixture (ACWC) with the addition of antistripping additives. Antistripping agents used in this study were Zycotherm, Morlife and Adhebit with variations of 0.1% addition, 0.3% and 0.5% of the weight of asphalt mixture. The results of this study showed that ACWC mixture with the addition of Zycotherm additives resulted in optimum Marshall stability and increased durability at 0.5% and Adhebit additives at 0.3% levels, while in Morlife additives although at 0.3% levels were able to show optimum marshall analysis in terms of increased durability did not show expected performance.


2019 ◽  
Vol 5 (3) ◽  
pp. 97
Author(s):  
Nurul Fauziah Endah Ningtyas ◽  
Samun Haris

ABSTRAKJalan sebagai sarana penunjang transportasi darat memiliki peran penting untuk memenuhi kebutuhan manusia. Salah satu material penting dalam pembuatan jalan adalah agregat. Sifat fisik agregat menjadi salah satu faktor penentu tebal lapisan struktur perkerasan. Ruas jalan Sofi–Wayabula adalah ruas jalan nasional strategis di Pulau Morotai dengan menggunakan perkerasan lentur. Agregat yang digunakan untuk lapis fondasi bawah pada ruas jalan ini adalah kombinasi agregat Eks. Palu dengan agregat Eks. Morotai. Tujuan dari penelitian ini adalah untuk menganalisis tebal lapis fondasi bawah berdasarkan koefisien kekuatan relatif ( ) yang didapat dari nilai CBR kombinasi agregat Eks. Palu dengan agregat Eks. Morotai dan agregat Eks. Palu pada struktur perkerasan lentur. Dari hasil perhitungan metode Manual Perkerasan Jalan 2017 didapatkan tebal lapis fondasi bawah sebesar 15 cm, bernilai sama, baik menggunakan kombinasi agregat Eks. Palu dengan agregat Eks. Morotai, maupun agregat Eks. Palu. Sedangkan, dengan menggunakan Pedoman Perkerasan Jalan Lentur 2011 didapat tebal lapis fondasi bawah sebesar 15,054 cm untuk kombinasi agregat Eks. Palu dengan agregat Eks. Morotai dan 14,608 cm untuk agregat Eks. Palu.Kata Kunci: perkerasan lentur, koefisien kekuatan relatif, lapis fondasi bawah. ABSTRACTRoads as a means of supporting land transportation have an important role to meet human needs. One of important material in road construction is aggregate. The aggregate physical properties become one of the determinants of the pavement thickness structure layer. The road segment of Sofi-Wayabula is a strategic national road in Morotai Island by using flexible pavement. The aggregate used for the sub-base course of the road is combination of aggregate Ex. Palu with Ex. Morotai aggregate. The purpose of this research is to analyze the thickness of the sub-base course based on relative strength coefficient  (a3) obtained from the value of CBR combination of aggregate Ex. Palu with Ex. Morotai aggregate and aggregate Ex. Palu on flexible pavement structures. From the calculation results of the Pavement Road Manual method 2017, the thick of sub-base course is 15 cm, have equal value using the combination of Ex. Palu aggregate with Ex. Morotai aggregate or the Ex.Palu aggregate. Meanwhile, by using Flexible Road Pavement Guideline 2011 the thickness of the sub-base course is 15,054 cm for combination of Ex.Palu aggregate with Ex. Morotai aggregate and 14,608 cm for Ex.Palu.Keywords: flexible pavement, relative strength coefficient, sub-base course.


CONSTRUCTION ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 1-11
Author(s):  
Ng Cui Ming ◽  
Ramadhansyah Putra Jaya ◽  
Haryati Awang

Hot Mix Asphalt (HMA) is the most commonly used in Malaysia for highways, interstates and roads due to its flexibility, economical, strong and provide safe riding quality for road users. Over the years, the increase of damage on pavement roads in Malaysia has become a severe issue although the road did not achieve its design life. Hence, to reduce damage and defect, an improvised road pavement structures is needed. Various studies have been conducted to identify the new materials that can be used as a replacement in hot mix asphalt. In this research, the purpose is to evaluate the performance of eggshell as coarse aggregate replacement in hot mix asphalt. The gradation for aggregate used in this mixture is AC14. The weight for total mixing of the aggregates used is 1200g while the grade for bitumen is 60/70. The samples were mixed with eggshell in the various percentages of 0%, 5%, 10%, 15% and 20% by total weight of aggregate size 5mm. The laboratory tests carried out to determine the properties of aggregates included, aggregate impact value and aggregate crushing value. Besides, penetration and softening point were also performed to determine the properties of bitumen. Several types of test were conducted towards the samples, which are Marshall Test, Indirect Tensile Strength and Cantabro Test. The results exhibit that the conventional asphalt mixture is more effective than modified asphalt mixture. The replacement of eggshell as coarse aggregate was not enough improvement to the performance of asphalt pavement as the performance of conventional mixture is more stable than modified mixture.


Author(s):  
Elena Gorodnova ◽  
Anastasiya Minchenko ◽  
Ekaterina Suvorova

Objective: To create a solid subgrade for highways and railways fulfillment. Methods: Drilling and blasting technology with vertical sand drains formation and explosion energy use was applied. The method in question assumes acceleration of weak organic soils consolidation and loose sands ompaction in the subgrade of the road embankment. Results: Research work was carried out to reduce deformations in the road embankment during the high-speed road construction. Based on the research data, the porosity coefficient and the density index of the sand layer, being the subgrade of the road embankment, were obtained. The article presents a comparison between the results calculated before and after the work. Practical importance: When comparing the results of cone penetration test in soil, obtained at different stages of work, the conclusion was made that the sands in the subgrade of the road embankment were compacted. This fact implies that the application of drilling and blasting technology at sand drains formation results both in weak soils stabilization and also in loose sands compaction. The range of conducted works provides durability and stability in the subgrade of the road embankment.


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