Author: Atef ElzeftawyPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 90
Book Description
A Method of Predicting Hydraulic Conductivity and Water Diffusivity for Pavement Subgrade Soils
Author: Atef ElzeftawyPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 90
Book Description
Soil-water Properties of Subgrade Soils
Author: Donald J. JanssenPublisher:
ISBN:
Category : Soils
Languages : en
Pages : 226
Book Description
A Transient Method for Measuring Soil Water Diffusivity and Unsaturated Hydraulic Conductivity
Author: D. R. ScotterMethod to Estimate Water Diffusivity and Hydraulic Conductivity of Moderately Dry Soil
Author: A. M. GlobusSelected Library Acquisitions
Author: United States. Department of TransportationPublisher:
ISBN:
Category :
Languages : en
Pages : 460
Book Description
Predicting the Progression of D-cracking
Author: Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 204
Book Description
Durability Cracking (D-cracking) is the progressive deterioration of Portland cement concrete (PCC) and is normally caused by winter freeze-thaw cycling. The PCC coarse aggregate source has been identified as causing well designed mixes to develop D-cracking. A common rehabilitation procedure for D-cracked PCC pavements is to overlay the PCC with asphalt concrete (AC). This renews the surface, but little is known about the long term effect of AC overlays on D-cracked PCC pavements. Specifically, will an AC overlay stop the progression of D-cracking, or accelerate it. The primary climatic factors responsible for D-cracking are moisture and temperature. Finite-difference transient flow computer moisture movement modeling as well as field instrumentation and laboratory measurements indicated that AC overlays have negligible effect on the PCC pavement moisture regime. This is due to the extremely low hydraulic conductivity of PCC. Evaporative drying of the PCC extends less than 2 in. into the PCC pavement. The effect of AC overlays on the PCC temperature regime was evaluated by finte-difference heat transfer computer modeling. AC overlays were found to decrease the number of freeze-thaw cycles and the rate of cooling in PCC pavements. The cooling rate at the top of an 8-in. PCC pavement in the St. Louis, Missouri area was decreased from 1.19 to 0.24 F°/hr by a 4-in. overlay.
Hydata
Author: Publisher:
ISBN:
Category : Water resources development
Languages : en
Pages : 758
Book Description
A Pavement Moisture Accelerated Distress (MAD) Identification System
Author: Soil Mechanics for Unsaturated Soils
Author: Delwyn G. FredlundPublisher: John Wiley & Sons
ISBN: 047185008X
Category : Technology & Engineering
Languages : en
Pages : 542
Book Description
The principles and concepts for unsaturated soils are developed as extensions of saturated soils. Addresses problems where soils have a matric suction or where pore-water pressure is negative. Covers theory, measurement and use of the fundamental properties of unsaturated soils--permeability, shear strength and volume change. Includes a significant amount of case studies.
Transportation Research Record
Author: National Research Council (U.S.). Transportation Research BoardPublisher:
ISBN:
Category : Air travel
Languages : en
Pages : 730
Book Description