2015 Market Conditions

This article provides a thorough examination of how lateral pressure on retaining walls is influenced by various types of surcharge loading. It covers essential topics, such as uniform, point, line, and strip loads, and includes guidelines from standards like Caltrans, AASHTO, and NAVFAC. The guide offers practical equations and methodologies for accurately calculating the impact of surcharge loads on both rigid and flexible retaining walls, considering traffic, construction equipment, and foundation loads. This detailed resource is invaluable for civil engineers involved in the design and construction of stable retaining walls.

Meredith Strows dives into the effects of Alkali-Silica Reaction and the importance of using petrographic examination.

The Concrete Maturity Method is a non-destructive technique that estimates in-place concrete strength by correlating its age and temperature during curing. Developed in 1951 and recognized by ASTM C1074, this method provides real-time strength data, aiding in construction decisions like form stripping or paving openings. However, it has limitations, such as not accounting for variables like aggregate coatings that can affect strength. While not a replacement for traditional strength tests, the maturity method serves as a complementary tool, enhancing safety and the integrity of concrete structures.