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Subgrade: Pengertian, Fungsi, Solusi dan Aplikasinya

Sifat Material Subgrade. Sebagai daya dukung tanah pada proyek perkerasan jalan, sifat material ini umumnnya terbagi menjadi tiga jenis antara lain: 1. Tanah dasar berbentuk kasar 2. Tanah dasar berbentuk butiran yang halus 3. Tanah dasar yang mampu mengembang.

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Steps For Preparation Of Subgrade

The material should have an Optimum Moisture Content(OMC) at this stage, ranging from +1% to –2%. The mixing or drying process should be adopted if OMC is not found within the permissible limit. When the material at the site is too Dry: Additional water shall be added to increase the moisture content up to the permitted limit. After ...

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HIGHWAY CONSTRUCTION MATERIALS

Good quality construction material makes superior pavements. Thickness, performance and efficiency of pavements depend upon quality of highway materials. Highway materials include: 1. Sub-grade soil 2. Stone aggregates 3. Bituminous materials 4. Cement and cement concrete Classification, characteristics and desirable properties: 1. Sub-grade soil

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Effects of Sub-Grade and Sub-Base Materials Quality on Flexible

PDF | On Oct 31, 2018, Getu Tamiru and others published Effects of Sub-Grade and Sub-Base Materials Quality on Flexible Pavement: A Case Study | Find, read and cite all the research you need on ...

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(PDF) Pavement materials: Soil

Compacted sub grade is the soil compacted by controlled movement of heavy compactors. Desirable properties. The desirable properties of sub grade soil as a highway material are . Soil Types. The wide range of soil types available as highway construction materials have made it obligatory on the part of the highway engineer to identify and ...

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Preparation of Sub Grade in Road (Nepal)

In-situ subgrade materials subject to mechanical stabilization shall be generally soils classified as SM, ML, CL, MH, CH in the General Classification of Soils described in Clause 609 with a CBR less than 5% or a moisture content close to saturation or too high moisture content to meet the compaction requirements as set out in Sub-clause 1003 ...

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Highway Materials

Highway Materials Soil: classification, nomenclature, desirable properties, laboratory and field test, IRC/MORT&H standards, materials for low-cost roads, stabilized soil, lime, fly ash, and cement and soil-bitumen ... Functions of sub-grade, sub-base, base course and Wearing course. Effects of dual wheels and tandem axles, area of contact ...

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4.1 Properties of Subgrade | unit 4 highway materials

Master the concepts of 4.1 Properties of Subgradewith detailed notes and resources available at Goseeko. Ideal for students and educators in Civil Engineering

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Typical Road Structure Cross Section

b. Characteristics of materials used in Sub Base: The subgrade material should be clean and free from organic matter and should be able to be compacted by roller, to form stable sub-base. The material should have …

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HIGHWAY AND TRAFFIC ENGINEERING PCI4I102

HIGHWAY MATERIALS Introduction There are different highway materials, viz, soil, stone, bitumen, concrete. Each material has defined desirable properties for the purpose for which it is used. The desirable properties of ... Sub grade soil is an integral part of the road pavement structure as it provides the support to

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Subgrade Soil

The supporting soil beneath pavement and its special under courses is called sub grade. Undisturbed soil beneath the pavement is called natural sub grade. ... The desirable properties of sub grade soil as a highway material are 1. Stability 2. Incompressibility 3. Permanency of strength 4. Minimum changes in volume and stability under adverse ...

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4. Highway Materials.pdf

2. 5.1. Classification of highway materials A highway consists of a number of layers namely Sub-Grade = The soil Supporting the roadway Sub base = The soil Supporting the Base,bridges base and subgrade Base = The soil …

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What Is Subgrade Layer In Road? (Updated 2025)

A subgrade layer in a road is the layer of material (usually soil, gravel or asphalt) that lies underneath the pavement or road surface. It is the foundation upon which the entire …

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Types of road material and its tests | PPT

1.SOIL 2.AGGREGATE 3.BITUMEN 4.CEMENT TYPES OF TEST ON ROAD MATERIAL 1.Test on soil sub grade- C.B.R. Test. 2.Test on Aggregate – Los Angeles abrasion, impact test, shape test. 3.Tests on bitumen- …

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1. Sub grade

The roller shall run over the sub-grade till the soil is evenly and densely consolidated and behaves as elastic mass (the roller shall pass a minimum of 5 runs on the sub-grade). All the undulations in the surface that developed due to rolling shall be made good with material or quarry spoils as the case may be and the sub-grade is re-rolled.

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Subgrade and Material Testing Services | BPC INDIA

BPC provide best Sub-grade and Material Testing Service in India with 17 years experience& having expert Highway engineering, testing team for Roads, Rail. Home; Services. ... We offer a wide range of routine materials testing services for aggregates, concrete, bitumen, soils and asphalts, as well as services such as geotechnical field testing ...

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EB204

AASHTO Classification of Highway Subgrade Materials. AASHTO Soil Classification System (from AASHTO M145) General Classification ... As with the sub-grade, any abrupt changes in the character of a sub­base can lead to reduced performance of a concrete pavement. As a guide, Table 8, taken from AASHTO M147, shows typical unstabilized subbase ...

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Highway Material.ppt

INTRODUCTION… A Highway Pavement is a structure consisting of superimposed layers of processed materials above the natural soil sub-grade. Primary function is to distribute the applied vehicle loads to the sub-grade. It should be able to provide a surface of acceptable riding quality, adequate skid resistance, favorable light reflecting characteristics, …

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What Is Road Subgrade in Construction and Why Is It Important?

The type of road (highway, local street, etc.), expected traffic flow and weather conditions will dictate the level of stabilization needed. Environmental Considerations: Any environmental restrictions, like the use of certain chemicals or the protection of local ecosystems, can influence the stabilization process and the choice of materials.

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Geotechnical properties of lateritic soil as subgrade and base material

Hence, researches have been done to uncover its alternative usage such as building material or as sub-grade materials for road constructions (Oluyinka and Olubunmi, 2018). Numerous researches have ...

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Highway Materials Unit-III | PPT

2. PAVEMENTS highway pavement is a structure consisting of superimposed layers of processed materials above the natural soil sub-grade, whose primary function is to distribute the applied vehicle loads to the sub-grade. The pavement structure should be able to provide a surface of acceptable riding quality, adequate skid resistance, favourable light …

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(PDF) Understanding the Performance of Expansive Subgrade Materials

grade material when dome ne, ... alternative lling materials for highway subgrade. Reclaimed asphalt . pavement ... Industrial waste and lime sludge were used to stabilise expansive sub-

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Module 3

Bituminous materials are very commonly used in highway construction because of their binding and their water proofing properties. When the bitumen contains some inert material or mineral, it is some times called asphalt. ... Properties of Sub Grade and Paving Materials The sub grade soil should posses the following properties: (i) Stability ...

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What Is Road Subgrade in Construction and Why Is It …

The road subgrade is the foundation layer on which the pavement of a road is constructed. It lies below the base course and directly supports the layers of the road. Essentially, it's the prepared layer of natural soil, rock, or …

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BAB I PEKERJAAN TANAH DASAR

(S umber : Highway Material, Robert D. Kerb, Richard D. Walker ) Penggunaan sbg sub grade Sangat baik Sangat baik-baik Sangat baik-baik Baik-cukup baik-cukup baik-cukup baik Cukup-jelek Cukup-jelek Jelek Jelek Jelek-sangat jelek Sangat jelek Tidak cocok Penggunaan sebagai material urugan Sang

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Pavement materials and testing | PPT

8. Tests on Soil • Sub grade soil is an integral part of the road pavement structure as it provides the support to the pavement from beneath. • The sub grade soil and its properties are important in the design of pavement structure. • The main function of the sub grade is to give adequate support to the pavement and for this the sub grade should possess sufficient stability …

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Highway Construction Materials Questions and Answers

The materials not included in highway construction are _____ a) Stone b) Dust c) Soil d) Petrol View Answer. Answer: d Explanation: Petrol is not used directly in highway construction, but by-product like bitumen is used. Stone, dust and soil may be used in subgrade and base. ... Sub grade b) Fill c) Base d) Sub base View Answer.

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The Importance of Sub-Grade Road Models in Construction …

There are several benefits of using sub-grade road models in construction planning for roadwork and highway projects, including: ... Efficient use of materials: Sub-grade road models ensure that the correct type and amount of materials are used in road construction. By optimizing the use of natural resources and minimizing excess material usage ...

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Pavement materials: Soil

The desirable properties of sub grade soil as a highway material are Stability Incompressibility ... (CBR) test was developed by the California Division of Highway as a method of classifying and evaluating soil-sub grade and base …

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Typical Road Structure Cross Section

Road Structure Cross Section is composed of the following components: 1. Surface/Wearing Course 2. Base Course 3. Sub Base 4. Sub Grade

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