scholarly journals Shear Strength of Tack Coat on Flexible Pavement and Composite Pavement

2018 ◽  
Vol 4 (2) ◽  
pp. 121
Author(s):  
Tampanatu P. F. Sompie ◽  
Syanne Pangemanan
Keyword(s):  
Shear Strength ◽  
Adhesive Layer ◽  
Flexible Pavement ◽  
Concrete Pavement ◽  
Direct Shear ◽  
Rigid Pavement ◽  
Tack Coat ◽  
Directorate General ◽  
The Right ◽  
Made In

Tack coat is a thin layer that spread on the surface of existing pavement or concrete pavement. The function of this layer is as an adhesive layer needed to give adhesive power between the existing pavement course and new pavement course or with the concrete pavement, therefore created one strong unity and would bond both, in order to withstand the sheer strength caused by the vehicle load on top of it. Strong adhesiveness of the tack coat course will add sheer strength between the interfaces of the pavement courses. Strong adhesiveness is gained from the asphalt mixed with solvent, therefore created the right viscosity level of the tack coat solution. This research was aimed to measure the sheer strength of tack coat by using modified direct shear asphalt samples. The research method used was by using gauge to measure the sheer strength of tack coat on asphalt sample which was the modified direct shear. While the samples were consisted of 2 types, the asphalt solvent sample as a model of flexible pavement course of AC-WC pavement type with optimum asphalt content of 6.1%, and concrete solvent sample as a model of rigid pavement. These samples were made in briquette form, made with Marshall Mould with 4 inches diameter. The tack coat solvent was made in three solvent variations, which was referring to the standard of the Directorate General of Highways. From this research, it could be concluded that the highest shear strength for flexible pavement was reached on the tack coal solvent mix composition of 30 pph and composite pavement of 15 pph. Tack coat spread rate of 0.25 l/m2 gave highest shear strength on flexible pavement and composition pavement of 0.35 l/m2. Balance was reached on flexible pavement on tack coat variation of 30 pph and 50 pph; while on composite pavement, balance was reached on tack coat solvent variation of 15 pph and 30 pph. This modified direct shear sample could be a method to measure shear strength of tack coat on flexible pavement and composite pavement.

scholarly journals PAVEMENT DESIGN THICKNESS OF GEMPOL – PASURUAN TOLL ROAD STA 13+900 UNTIL STA 20+900 USING PAVEMENT DESIGN MANUAL 2017

2019 ◽  
Vol 3 (1) ◽  
pp. 93
Author(s):  
Kamila Wahidaturrohmah ◽  
Akhmad Hasanuddin ◽  
Willy Kriswardhana
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Plate Thickness ◽  
Flexible Pavement ◽  
Pavement Design ◽  
Rigid Pavement ◽  
Toll Road ◽  
Calculation Results ◽  
Pavement Construction ◽  
The Right

Gempol – Pasuruan toll road from STA 13+900 until STA 20+500, is one of the packages of the Trans Java Toll Road. This toll road was built to facilitate access to land transportation in the Java region. It has 6,6 km with a width of 4,6 meters on the right side and 4,6 meters on the left side section, each consisting of 2 lanes in 1 direction. The method used to design the pavement thickness is Manual Desain Perkerasan Jalan 2017. From the calculation results, knowing that the traffic volume is 3.165.089 ESA4 so that two types of pavement chosen, namely rigid pavement and flexible pavement. The calculation results of flexible pavement construction obtained a 40 mm AC WC, 60 mm AC BC, 80 mm AC Base 80, 380 mm grade-A aggregate foundation, 450 mm grade B aggregate foundation thickness, with a cost of discounted life cycle 413.515.845.291,70 rupiahs. For rigid, continuous without reinforced pavement with 290 mm plate thickness, 100 mm lean concrete, using tie bar (threaded) BJTU 24 length 70 cm D16 and dowel (plain) length 45 cm D36, with discounted life cycle cost is 398.732.419.535 rupiahs. So the type of pavement based on the lowest discounted life cycle cost is using the rigid pavement. Jalan Tol Gempol – Pasuruan STA 13+900 s/d STA 20+500 merupakan salah satu paket Jalan Tol Trans Jawa yang dibangun untuk mempermudah akses transportasi darat di wilayah Jawa, sepanjang 6,6 km dengan lebar jalan 4,6 meter ruas kanan dan 4,6 meter ruas kiri masing-masing terdiri dari 2 lajur 1 arah. Metode yang digunakan untuk perencanaan tebal perkerasan adalah Manual Desain Perkerasan Jalan Tahun 2017. Dari hasil perhitungan diketahui volume lalu lintas 3.165.089 ESA4 sehingga dipilih dua jenis perkerasan yaitu perkerasan kaku dan perkerasan lentur. Hasil perhitungan konstruksi perkerasan lentur diperoleh tebal AC WC 40 mm, tebal AC BC 60 mm, tebal AC Base 80 mm, tebal Lapis Pondasi Agregat kelas A 380 mm, dan tebal Lapis Pondasi Agregat kelas B 450 mm, dengan nilai discounted life cycle cost Rp. 413.515.845.291,70. Untuk perkerasan kaku bersambung tanpa tulangan dengan tebal pelat beton 290 mm, tebal lean concrete 100 mm, menggunakan tie bar (ulir) BJTU 24 panjang 70 cm D16 dan dowel (polos) panjang 45 cm D36, dengan nilai discounted life cycle cost adalah Rp. 398.732.419.535. Sehingga jenis perkerasan berdasarkan nilai discounted life cycle cost terendah adalah menggunakan perkerasan kaku.

scholarly journals PENGARUH VARIASI TEBAL DAN MUTU BETON TERHADAP RESPONS STRUKTURAL PERKERASAN KAKU

2019 ◽  
Vol 19 (1) ◽  
pp. 1-10
Author(s):  
Mizan Qisthi ◽  
Berlian Kushari
Keyword(s):  
Plain Concrete ◽  
Flexible Pavement ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Rigid Pavement ◽  
Stiffness Modulus ◽  
Road Pavement ◽  
Design Life ◽  
Concrete Quality ◽  
Pavement Damage

Abstract Flexible pavement in the approaching legs of intersection carrying heavy vehicle traffic is often damaged more quickly than what happens in other parts of the pavement. This happens because of the increasing loading time which weakens the pavement stiffness modulus. To overcome this, the flexible pavement on the intersection approaching legs can be replaced by a rigid pavement. This study discusses the design of Jointed Plain Concrete Pavement rigid pavement in the Eastern Approach of North Ringroad-Seturan Highway intersection, in Sleman, Yogyakarta. The Guideline for Design of Cement Concrete Road Pavement, Pd T-14-2003, was used to calculatepaveent thickness and design of joints. The analysis was carried out using a mechanistic-empirical approach using KENSLABS software. The results show that the K400 concrete quality with a thickness of 24 cm is capable of meeting the of fatigue and erosion requirements for a 20-year design life. Keywords: flexible pavement, design life, pavement damage, stiffness modulus, rigid pavement  Abstrak Perkerasan lentur pada bagian pendekat simpang yang dilalui lalu lintas kendaraan berat sering kali mengalami kerusakan yang lebih cepat dibandingkan yang terjadi pada bagian lain perkerasan tersebut. Hal ini terjadi karena meningkatnya waktu pembebanan yang melemahkan modulus kekakuan perkerasan. Untuk mengatasi hal ini, perkerasan lentur pada pendekat simpang dapat diganti menjadi perkerasan kaku. Penelitian ini membahas perancangan perkerasan kaku jenis Jointed Plain Concrete Pavement pada Pendekat Timur Simpang Ring Road Utara–Jalan Raya Seturan, di Sleman, Yogyakarta. Pedoman Petunjuk Perencanaan Jalan Beton Semen Pd T-14-2003 digunakan untuk menghitung tebal perkerasan dan perancangan sambungan. Analisis dilakukan dengan menggunakan pendekatan mekanistik-empiris menggunakan perangkat lunak KENSLABS. Hasil penelitian ini memperlihatkan bahwa mutu beton K400 dengan tebal 24 cm mampu memenuhi persyaratan kerusakan fatik dan erosi untuk umur rencana 20 tahun. Kata-kata kunci: perkerasan lentur, umur rencana, kerusakan perkerasan, modulus kekakuan, perkerasan kaku

Direct shear strength test on rocks along discontinuities, under laboratory conditions

2014 ◽  
Vol 9 (3) ◽  
pp. 139-150 ◽  
Author(s):  
Ildikó Buocz ◽  
Nikoletta Rozgonyi-Boissinot ◽  
Ákos Török ◽  
Péter Görög
Keyword(s):  
Shear Strength ◽  
Strength Test ◽  
Direct Shear ◽  
Shear Strength Test ◽  
Laboratory Conditions

ANALISIS YURIDIS NORMATIF PUTUSAN PERKARA MAHKAMAH AGUNG KONSTITUSI RI No. 004/PUU-II/2004

2013 ◽  
Vol 7 (1) ◽  
pp. 7
Author(s):  
Doni Budiono
Keyword(s):  
The Body ◽  
Supreme Courts ◽  
Military Justice ◽  
State Administration ◽  
The Supreme Court ◽  
Directorate General ◽  
The Government ◽  
Government Rules ◽  
The Right ◽  
Tax Court

The  authority  of justice in Indonesia  is executed by  the Supreme Courts and  the  justice  boards/body under the Supreme Courts, including  the general  justice, religious affairs justice, military justice,  state administration  justice,  and  the Constitution Court. According to  certainty in  the Act of  Tax Court, Article1, clause  (5),  tax  dispute   refers to the legal dispute arising in the  taxation  affairs between the  tax payer or the  body  responsible for the  tax with   the government   executives  ( Directorate General of Tax) as the consequence of   the issue of  the decree for the  appeal  to the Tax  Court in accordance with the  tax Act, including the  charge  against the  execution of collection   in accordance with the  Act of Tax Collection by force. The  formation of Tax Court is  designed by  the Executives, in this case, the  Department of Finance, specifically  the Directorate   General  of Tax  which has the right to issue  law  more technical about  tax accord to Article 14,  letter A,  President Decree  no. 44  year 1974,  concerning the  basic  organization of the Department.  Based on  it,  it  is clear that  in addition to execute the government  rules and policy,  this body  has to execute judicial   rules and policy. This is against the  principles of  Judicative  Power/Authority in Indonesia,  which   clearly states that this body  should be under the Supreme Court.   Therefore. It is suggested that   the Act  No UU no.14 Year 2012 concerning  Tax Court   be revised  in accordance with the system of  Power Division  of Justice  as  stated in 45 Constitutions.

Cancellation and Termination of Assignment Contract of Patrimonial Rights of the Author

2019 ◽  
Vol 25 (2) ◽  
pp. 197-201
Author(s):  
Tudor-Vlad Sfârlog
Keyword(s):  
Scientific Research ◽  
Legal Provisions ◽  
The Right ◽  
Made In

Abstract The present study offers the doctrine of the right of intellectual creation new perspectives on the study of the institution of termination of the assignment contract for the patrimonial rights resulting from the intellectual creation. We believe that the present study is rich in doctrinal contributions, formulating new theses and opening the prospect for new perspectives of scientific research. Last but not least, we appreciate that the proposals made in the present study contribute not only to the activity of opinionated in the field, but also to the work of practitioners and direct beneficiaries of the legal provisions on the assignment of patrimonial rights of authors.

scholarly journals Study on the Strength Performance of Recycled Aggregate Concrete with Different Ages under Direct Shearing

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2312
Author(s):  
Xin Liang ◽  
Fang Yan ◽  
Yuliang Chen ◽  
Huiqin Wu ◽  
Peihuan Ye ◽  
...  
Keyword(s):  
Shear Strength ◽  
Shear Force ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Displacement Curve ◽  
Direct Shear ◽  
Replacement Ratio ◽  
Aggregate Concrete ◽  
Concrete Failure ◽  
Load Displacement

In order to study the mechanical properties of recycled aggregate concrete (RAC) at different ages, 264 standard cubes were designed to test its direct shear strength and cube compressive strength while considering the parameters of age and recycled aggregate replacement ratio. The failure pattern and load–displacement curve of specimens at direct shearing were obtained; the direct shear strength and residual shear strength were extracted from the load–displacement curves. Experimental results indicate that the influence of the replacement ratio for the front and side cracks of RAC is insignificant, with the former being straight and the latter relatively convoluted. At the age of three days, the damaged interface between aggregate and mortar is almost completely responsible for concrete failure; in addition to the damage of coarse aggregates, aggregate failure is also an important factor in concrete failure at other ages. The load–displacement curve of RAC at direct shearing can be divided into elasticity, elastoplasticity, plasticity, and stabilization stages. The brittleness of concrete decreases with its age, which is reflected in the gradual shortening of the elastoplastic stage. At 28 days of age, the peak direct shear force increases with the replacement ratio, while the trend is opposite at ages of 3 days, 7 days, and 14 days, respectively. The residual strength of RAC decreases inversely to the replacement ratio, with the rate of decline growing over time. A two-parameter RAC direct shear strength calculation formula was established based on the analysis of age and replacement rate to peak shear force of RAC. The relationship between cube compressive strength and direct shear strength of recycled concrete at various ages was investigated.

scholarly journals Mechanical Properties and Micro Mechanism of Nano-Clay-Modified Soil Cement Reinforced by Recycled Sand

2021 ◽  
Vol 13 (14) ◽  
pp. 7758
Author(s):  
Biao Qian ◽  
Wenjie Yu ◽  
Beifeng Lv ◽  
Haibo Kang ◽  
Longxin Shu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Void Ratio ◽  
Soil Mass ◽  
Direct Shear ◽  
Test Results ◽  
The Sustainable Development ◽  
Direct Shear Tests ◽  
Soil Cement ◽  
Nano Clay ◽  
New Material

To observe the effect of recycled sand and nano-clay on the improvement of the early strength of soil-cement (7d), 0%, 10%, 15% and 20% recycled sand were added. While maintaining a fixed moisture content of 30%, the ratios of each material are specified in terms of soil mass percentage. The shear strength of CSR (recycled sand blended soil-cement) was investigated by direct shear test and four groups of specimens (CSR-1, CSR-2, CSR-3 and CSR-4) were obtained. In addition, 8% nano-clay was added to four CSR groups to obtain the four groups of CSRN-1, CSRN-2, CSRN-3 and CSRN-4 (soil-cement mixed with recycled sand and nano-clay), which were also subjected to direct shear tests. A detailed analysis of the modification mechanism of soil-cement by recycled sand and nano-clay was carried out in combination with scanning electron microscopy (SEM) and IPP (ImagePro-Plus) software. The test results showed that: (1) CSR-3 has the highest shear strength due to the “concrete-like” effect of the incorporation of recycled sand. With the addition of 8% nano-clay, the overall shear strength of the cement was improved, with CSRN-2 having the best shear strength, thanks to the filling effect of the nano-clay and its high volcanic ash content. (2) When recycled sand and nano-clay were added to soil-cement, the improvement in shear strength was manifested in a more reasonable macroscopic internal structure distribution of soil-cement. (3) SEM test results showed that the shear strength was negatively correlated with the void ratio of its microstructure. The smaller the void ratio, the greater the shear strength. This shows that the use of reclaimed sand can improve the sustainable development of the environment, and at the same time, the new material of nano-clay has potential application value.

Mechanics Properties of the Lime-Fly Ash Stabilized Soil for Pavement Structures

2012 ◽  
Vol 594-597 ◽  
pp. 1445-1448
Author(s):  
Tao Cheng ◽  
Ke Qin Yan
Keyword(s):  
Fly Ash ◽  
Unconfined Compressive Strength ◽  
Flexible Pavement ◽  
Rigid Pavement ◽  
Test Compaction ◽  
Mix Proportion ◽  
Stabilized Soil ◽  
Pavement Structures ◽  
Optimum Water ◽  
Water Contents

Mechanics properties of lime- fly ash stabilized soil are investigated. First, the chemical composition of fly ash are analyzed by spectral analysis test. Compaction experiments of all mix proportion projects are carried out in different water conditions to obtain the optimum water contents. Then the optimum mix proportion is obtained by the unconfined compressive strength and the compression rebound modulus test. Finally, the pavement structures design for a highway of lime- fly ash stabilized soil road sub-base is done. By the comparison, a conclusion can be drawn that lime-fly ash stabilized soil is suitable for flexible pavement or semi-rigid pavement because of its good strength and rigidity which can effectively reduce thickness of the lower pavement and basic deflection.

Shear strength and dilative characteristics of an unsaturated compacted completely decomposed granite soil

2010 ◽  
Vol 47 (10) ◽  
pp. 1112-1126 ◽  
Author(s):  
Md. Akhtar Hossain ◽  
Jian-Hua Yin
Keyword(s):  
Shear Strength ◽  
Normal Stress ◽  
Matric Suction ◽  
Water Retention Curve ◽  
Direct Shear ◽  
Normal Stresses ◽  
Soil Water Retention Curve ◽  
Strength Data ◽  
Decomposed Granite ◽  
Completely Decomposed Granite

Shear strength and dilative characteristics of a re-compacted completely decomposed granite (CDG) soil are studied by performing a series of single-stage consolidated drained direct shear tests under different matric suctions and net normal stresses. The axis-translation technique is applied to control the pore-water and pore-air pressures. A soil-water retention curve (SWRC) is obtained for the CDG soil from the equilibrium water content corresponding to each applied matric suction value for zero net normal stress using a modified direct shear apparatus. Shear strength increases with matric suction and net normal stress, and the failure envelope is observed to be linear. The apparent angle of internal friction and cohesion intercept increase with matric suction. A greater dilation angle is found at higher suctions with lower net normal stresses, while lower or zero dilation angles are observed under higher net normal stresses with lower suctions, also at a saturated condition. Experimental shear strength data are compared with the analytical shear strength results obtained from a previously modified model considering the SWRC, effective shear strength parameters, and analytical dilation angles. The experimental shear strength data are slightly higher than the analytical results under higher net normal stresses in a higher suction range.

scholarly journals Influence of Structural Plane Microscopic Parameters on Direct Shear Strength

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Yanhui Cheng ◽  
Weijun Yang ◽  
Dongliang He
Keyword(s):  
Particle Size ◽  
Shear Strength ◽  
Internal Friction ◽  
Direct Shear Test ◽  
Shear Test ◽  
Friction Angle ◽  
Internal Friction Angle ◽  
Direct Shear ◽  
Stiffness Ratio ◽  
Structural Plane

Structural plane is a key factor in controlling the stability of rock mass engineering. To study the influence of structural plane microscopic parameters on direct shear strength, this paper established the direct shear mechanical model of the structural plane by using the discrete element code PFC2D. From the mesoscopic perspective, the research on the direct shear test for structural plane has been conducted. The bonding strength and friction coefficient of the structural plane are investigated, and the effect of mesoscopic parameters on the shear mechanical behavior of the structural plane has been analyzed. The results show that the internal friction angle φ of the structural plane decreases with the increase of particle contact stiffness ratio. However, the change range of cohesion is small. The internal friction angle decreases first and then increases with the increase of parallel bond stiffness ratio. The influence of particle contact modulus EC on cohesion c is relatively small. The internal friction angle obtained by the direct shear test is larger than that obtained by the triaxial compression test. Parallel bond elastic modulus has a stronger impact on friction angle φ than that on cohesion c. Under the same normal stress conditions, the shear strength of the specimens increases with particle size. The shear strength of the specimen gradually decreases with the increase of the particle size ratio.

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