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Chapter III "Highway"

A, testing engineer examination outline.

The purpose and requirements of the exam

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2. Main inspection contents

Standard for quality inspection and evaluation of highway engineering.

(1) highway engineering quality inspection and evaluation method

Understand: the concept and division method of unit, division and subdivisional work; Key items, specified extreme values, etc.

Familiar with: inspection and evaluation procedures; Contents of quality inspection of subdivisional work; Engineering quality scoring method; Grade evaluation of engineering quality.

Master: the purpose and scope of application of "Standard for Quality Inspection and Evaluation of Highway Engineering"; Provisions on grading of sectional works.

2 subgrade earthwork quality inspection items

Understand: the basic requirements of earthwork subgrade, stone subgrade, soft soil foundation treatment and geosynthetics treatment layer; Appearance appraisal of earthwork subgrade and stone subgrade; Detection items of soft soil foundation treatment and geosynthetics treatment layer; Prefabrication of pipe joint, installation of pipe foundation and pipe joint, masonry of (rainwater) well, inspection of basic requirements and appearance appraisal of earth ditch, mortar drainage ditch and blind ditch; Basic requirements and appearance evaluation of retaining wall and masonry engineering; Basic requirements of other subdivisional work.

Familiarity: general provisions; Measurement items of earthwork subgrade and stone subgrade; Key projects of soft soil foundation treatment and geosynthetics treatment layer; General provisions of drainage works; Prefabrication of pipe joint, installation of pipe foundation and pipe joint, masonry of (rainwater) well, inspection of measured items of earthwork ditch, mortar drainage ditch and blind ditch; Basic requirements for backfilling the back of the wall; Measurement items of retaining wall and masonry engineering; Main measurement items of other projects.

Master: key projects of earthwork subgrade and stone subgrade measurement; Prefabrication of pipe joint, installation of pipe foundation and pipe joint, masonry of (rainwater) well, inspection of key measurement items of earthwork ditch, mortar drainage ditch and blind ditch; Main survey items of retaining wall, backfill and masonry engineering.

(3) Inspection and evaluation of pavement surface engineering quality

Understanding: Appearance identification of cement concrete surface and asphalt concrete surface; Basic requirements and testing items of asphalt penetration surface layer and asphalt surface treatment surface layer; Basic requirements, measurement items and appearance evaluation of kerbs and shoulders.

Familiarity: general provisions; Testing items and basic requirements of cement concrete pavement and asphalt concrete pavement.

Master: key projects of cement concrete surface course and asphalt concrete surface course; Inspection and evaluation methods of compactness, thickness, deflection and anti-sliding performance.

4. Asphalt mixture and cement concrete

Understand: the types and characteristics of asphalt mixture; The concepts of high temperature stability, low temperature crack resistance and water stability of asphalt mixture; Concept and meaning of technical index of asphalt mixture.

Familiar with: the influence of porosity on the performance of mixture; The expression method of asphalt content in asphalt mixture, the concepts of asphalt content and asphalt-aggregate ratio and the conversion method between them; Marshall specimens have different density definitions and commonly used density detection methods; The purpose and operation steps of rutting test; Two test methods of adhesion between mineral aggregate with different particle sizes and asphalt: requirements for cement concrete raw materials; Factors affecting the strength and workability of cement concrete: the test of setting time of cement concrete.

Master: Marshall specimen forming method, key factors affecting specimen preparation; Calculation method for determining the mixture dosage of standard Marshall specimen; Marshall specimen gross bulk density, apparent density and maximum relative theoretical density test operation flow; Operation and matters needing attention of Marshall stability test: Operating steps of water boiling method and water invasion method; Several commonly used asphalt content detection methods; Design content of asphalt mixture ratio; Key points of cement concrete mix design: strength test of cement concrete; The workability test of cement concrete.

13. Pavement base and base material

(1) Pavement base

Understanding: general regulations, classification and appearance appraisal of grass-roots units; The type, classification requirements and scope of application of the base; Technical requirements of lime industry for lime, fly ash, soil and other wastes.

Familiarity: basic requirements and measurement items of grass-roots units; The purpose and key points of mixture composition design.

Master control: the key project of grass-roots survey; Inspection and evaluation method of compactness and strength.

(2) Test and detection of pavement base materials

Understanding: theoretical calculation method for determining the maximum dry density of semi-rigid base material; Manufacture and preparation of samples for measuring indoor compressive resilience modulus by top surface method.

Familiar with: the purpose and application scope of EDTA titration; Determination method of lime or cement dosage; Test method for inorganic binders of lime and fly ash; Test purpose and application scope of water content determination by drying method; Unconfined compressive strength test method; Splitting test method; Test method of load-bearing ratio (CBR); Test method for determining maximum dry density; Standard density test method for flexible base materials.

Master: determination method of EDTA titration; Test steps for measuring water content of inorganic binder stabilized soil by drying method: compaction test steps, key points and calculation of inorganic binder stabilized soil; Preparation, curing and strength requirements of unconfined compressive strength samples; Preparation and maintenance of split samples; Test procedure for determining indoor compressive resilience modulus by top surface method: operation procedure for testing effective calcium oxide and magnesium oxide content.

4. Field test of subgrade and pavement.

(1) Compaction test of subgrade and pavement

Familiar with: detection methods and application scope of field density test; Problems that should be paid attention to in sand filling method and ring knife method test; Application scope and test points of nuclear densitometer test.

Mastery: compact concept; The steps and key points of calibrating the sand quality in the cone at the lower part of the cylinder by sand filling method; Steps and key points of measuring unit mass of quantitative sand by sand filling method: experimental steps and key points of measuring field density by sand filling method, density calculation; Test steps and key points of measuring field strength by ring knife method, density calculation; Test steps of nuclear densitometer test; Test steps and key points of measuring asphalt pavement density by core drilling method.

⑵ Deflection detection method

Understanding: the concept of deviation value.

Familiar with: the purpose and scope of application of Beckmann beam method to test deflection; Axial load requirements for deflection test; Beckman beam deflector.

Master the steps and calculation of deflection test by Beckman beam method.

(3) testing method of resilience modulus

Understanding: the purpose, application scope and testing steps of Beckmann beam method for testing rebound modulus; Purpose and scope of application of pressure plate method for testing resilience modulus.

Familiar with: common testing methods of resilience modulus.

Master: the steps and key points of testing rebound modulus by bearing plate method.

(4) Test method of splitting strength of cement concrete pavement core sample.

Familiar with: the steps and key points of splitting strength test of cement concrete pavement core sample.

Master: inspection contents of cement concrete pavement core samples.

5] flatness test method

Understanding: Establish the relationship between concave-convex accumulator (VBI) and international roughness index (IRI); Application scope, equipment, test result processing and matters needing attention of vehicle-mounted bump integrator method.

Familiar with: the concept of flatness, commonly used testing equipment and indicators; Scope of application, instruments and equipment, treatment of test results and matters needing attention of 3m straightedge determination method and continuous flatness meter method.

Master: the test steps of 3m ruler method and continuous flatness instrument method.

[6] Test and detection methods of pavement skid resistance

Understand: the concept of pavement anti-skid performance and its influencing factors; Test method and principle of pavement anti-skid performance; The scope of application, equipment requirements, measuring steps and test data processing of the transverse force coefficient measuring vehicle.

Familiar with: the scope of application of manual sand laying method and pendulum instrument method; Temperature correction of pendulum value measured by pendulum instrument: problems that should be paid attention to in pavement anti-skid performance testing.

Master: test and calculation of artificial sand laying method; Requirements for rubber plate in pendulum instrument test: steps and key points of pendulum instrument test.

Once the pavement structure layer thickness test detection method

Understand: the common detection methods of pavement structure layer thickness and their application scope.

Familiarity: the key points of coring and thickness measurement.

Master: the filling point of drilling.

⑻ Test method for water permeability of asphalt pavement

Understanding: the concept of permeability coefficient of asphalt pavement.

Familiar with: the purpose and scope of application of asphalt pavement permeability test.

Master: steps and key points of asphalt pavement permeability test.

⑼CBR value field detection technology

Understand: CBR value requirements of subgrade filler; Indirect reasoning algorithm for long rod penetrating CBR.

Familiar with: field CBR value test method of soil foundation.

⑽ New deflection detection technology

Understand the working principle of automatic deflectometer and falling weight deflectometer.

⑾ New detection technology of pavement smoothness and skid resistance and pavement radar test system.

Understand: laser grader; Friction coefficient measuring equipment; Laser structural depth meter: road radar test system.