Compaction Control Bermuda Sports Centre

Collapsible soils are encountered in arid and semi-arid regions. Such soils cause potential construction problems due to their collapse upon wetting. The collapse phenomenon is primarily related to the open structure of the soil. Several soil collapse classifications based on parameters such as moisture content, dry density, Atterberg limits and clay content have been proposed in the literature as indicators of the soil collapse potential. Direct measurement of the magnitude of collapse, using laboratory and/or field tests, is essential once a soil showed indications of collapse potential. Treatment methods such as soil replacement, compaction control and chemical stabilization showed significant reduction in the settlement of collapsible soils. The design of foundations on collapsible soils depends on the depth of the soil, magnitude of collapse and economics of the design. Strip foundations are commonly used when collapsing soil extends to a shallow depth while piles and drilled piers are recommended in cases where the soil extends to several meters. This paper provides a comprehensive review of collapsible soils. These include the different types of collapsible soils, mechanisms of collapse, identification and classification methods, laboratory and field testing, treatment methods and guidelines for foundation design.

Download Full-text

Variability in Compaction Control

Journal of Geotechnical Engineering ◽

10.1061/(asce)0733-9410(1990)116:7(1132) ◽

1990 ◽

Vol 116 (7) ◽

pp. 1132-1136 ◽

Cited By ~ 4

Author(s):

Iraj Noorany

Keyword(s):

Compaction Control

Download Full-text

Leveraging Intelligent Compaction and Thermal Profiling Technologies to Improve Asphalt Pavement Construction Quality: A Case Study

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198118758285 ◽

2018 ◽

Vol 2672 (26) ◽

pp. 48-56 ◽

Cited By ~ 5

Author(s):

George K. Chang ◽

Kiran Mohanraj ◽

William A. Stone ◽

Daniel J. Oesch ◽

Victor (Lee) Gallivan

Keyword(s):

Real Time ◽

Satellite System ◽

Material Transfer ◽

Intelligent Compaction ◽

Two Factors ◽

Thermal Profiling ◽

Compaction Control ◽

Pavement Construction ◽

Global Navigation Satellite

Intelligent compaction (IC) is an emerging technology with rollers equipped with global navigation satellite system (GNSS), an accelerometer-based measurement system, and an onboard color-coded display for real-time monitoring and compaction control. Paver-mounted thermal profiling (PMTP) is used to monitor asphalt surface temperatures behind a paver with a thermal scanner, and to track paver speeds, stops, and stop durations. Leveraging both IC and PMTP technologies allows for paving and compaction controls in real time, and for executing appropriate adjustments as needed. A case study is used to demonstrate the advantage of using both IC and PMTP over conventional operations. Postconstruction asphalt coring and tests, as well as pavement profile surveys were conducted to provide asphalt density data and pavement smoothness acceptance data for comparison and correlation analysis with IC and PMTP data. The data from 2 days of operations, one without the Material Transfer Vehicle (MTV) and another with the MTV, were analyzed and compared to illustrate the benefits of using IC, PMTP, and MTV for producing quality pavement products. Durability and smoothness are two key construction qualities for agencies and users of hot mix asphalt (HMA) pavements. These two factors also affect the long-term structural and functional pavement performance.

Download Full-text