QAQC CIVIL ENGINEERING

Knowledge about Civil Engineer & Quality Control. ✓Testing of Soil, Cement, Aggregate, Admixture, Water, Concrete , Bitumen, Steel & other construction materials. ✓Mix Design of Concrete (M25, M30, M35, M40, M45, M50, M60), PQC, DLC, GSB, WMM, DBM, BC, Mastic, Cement Grouting and other. ✓Site Laboratory Setup ✓QAP (Quality assurance plan) ✓QAQC Checklist ✓IS , IRC, MROTH, RDSO, ASTM specifications

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DESIGN MIX OF DENSE BITUMINOUS MACADAM (DBM) GRADING-1 BY MODIFIED MARSHALL METHOD

DBM (Dense Bituminous Macadam) is a part of flexible pavement and the work shall consist of construction of single or multiple layers on wmm or sub base. The thickness of single layer shall be 50mm to 100mm as per MORTH specification. According to MORTH 5th rev. Table 500-10 , There are Two grading are specified for DBM construction (1) DBM Grading-1 Grading-1 is suitable for layer thickness of 75 mm to 100 mm and 37.5mm nominal size of aggregate shall be used. Bitumen content by mass of total mix = 4 % minimum (2) DBM Grading-2 Grading-2 is suitable for layer thickness of 50 mm to 75 mm and 26.5 mm nominal size of aggregate shall be used. Bitumen content by mass of total mix = 4.5 % minimum Reference code and specification MORTH 5th Rev. Asphalt Institute Manual MS-2 ASTM-D6926 ASTM-D6927 ASTM-D5581 IS-73-2013 IS-1201-1220:1978 ASTM-D2041 AASHTO-T283 DESIGN MIX OF DBM GRADING-1 (Dense Bituminous Macadam) Thank You for Visiting

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GSB METHODOLOGY & MIX-DESIGN DATA

CONTENTS 1. SCOPE OF WORK 2. MATERIALS 2 .1. Physical requirements. 3. CONSTRUCTION OPERATIONS 3.1. Preparation of sub grade 3.2. Mixing of Material 3.3. Flow Chart for the Construction of Granular Sub-Base 4. SPREADING & COMPACTING 5. MIX DESIGN DATA 1. SCOPE OF WORK This work shall consist of laying and compacting well-graded material on prepared subgrade in accordance with the requirements of Specifications. The Grades-V material shall be laid in one layer as sub-base. Lying shall be done as per cross sections shown on the drawings or as directed by the Engineer. 2. MATERIALS The material to be used for the work shall be crushed stone & river sand. Proportion is ...