QAQC in Construction

Comparison between AASHTO and unifical soil classification system Comparison #  AASHTO M145 Classification System : American Association of State Highway and Transport Officials (AASHTO) soil classification system is based on both the particle size and the plasticity characteristics. According to this system, soils are classified into eight groups A-1 to A-8, the last being peat or muck. Soils within each group are evaluated according to the group index (GI) calculated from the following empirical formula – GI = 0.2 a + 0.005 ac + 0.01 bd Where a = that part of the percent passing US sieve No. 200 greater than 35, and not exceeding 75, expressed as a positive whole number (1 to 40); b = that part of the percent passing US sieve No. 200 greater than 15, and not exceeding 55 expressed as a positive whole number (1 to 40); c = that part of the liquid limit greater than 40, and not greater than 60, expressed as a positive whole number (1 to 20), and d = that part of t...

There is no doubt that highways, roads, and airfields are crucial for modern transportation, as they literally lay the ground for extensive movement. However, during road construction, the ground is not always guaranteed to be viable; this is dependent on the soil profile, so there is a need to comprehend the properties of soil at the sub-grade level. AASHTO M145 / ASTM D3282 -15:  (Standard Practice for Classification of Soils and Soil-Aggregate Mixtures for Highway Construction Purposes) classifies soils from any geographic location into groups. This it bases on the results of laboratory tests it details to determine the particle-size characteristics, liquid limit, and plasticity index of soils. AASHTO M145 / ASTM D3282 -15  includes classification tables drawn from the American Association of State Highway and Transportation Officials (AASHTO) system, which originated as the Public Roads Classification System when Hogentogler and Terzaghi developed it in 1929. Th...

Method Statement for Formwork, Reinforcement and Concrete Works Table of Contents 1. Method Statement for Formwork, Reinforcement and Concrete Works 1.1  SCOPE: 1.2  FABRICATION AND INSTALLATION OF FORMS: 1.2.1  Type of Formwork: 1.2.2  Formwork Design: 1.2.3  Ties: 1.2.4  Coating: 1.2.5  Removal of Forms and Shoring: 1.2.6  Shoring and Propping: 1.2.7  Chamfers: 1.3  REINFORCEMENT: 1.3.1  Handling and stacking: 1.3.2  Cutting and Bending of Bars: 1.3.3  Receipt and Storage of Bars: 1.3.4  Placing of Reinforcement: 1.3.5  Fixing of Reinforcement: 1.3.6  Quality Control: 1.4  EMBEDDED ITEMS: 1.5  CONCRETING: 1.5.1  Transportation of Concrete: 1.5.2  Delivery of Concrete: 1.5.3  Deposition of Concrete: 1.5.4  Protection of Fresh Concrete: 1.5.5  Curing of Concrete: 1.5.6  Quality Control: 1.6  TESTING OF CONCRETE: 1.7 ...

Method Statement for Asphalt Paving Works (Civil Engineering) Effective Date: Document No.: Approved By:     Eng. Muhammad Arif PROJECT NAME: -------------------------------------------------------------------------- SAMPLE 1 TABLE OF CONTENT 1.      ACTIVITY 2.      INTRODUCTION 3.      TERMINOLOGY 4.      SIGNIFICANT HAZARDS IDENTIFIED 5.      ROLES & RESPONSIBILITY AND ORGANIZATION CHART 6.      SEQUENCE OF ACTIVITIES WITH RESPONSIBILITIES 6.1    Pre-commencement Requirements 6.2   General Requirements 6.3   Co-ordination with Other Trades 6.4    Delivery, Storage & Handling of Materials 6.5    Execution 7.      REQUIREMENTS  7.1   Plans/Records & Job instructions (Documentations)  7.2   Training ...