The structural failure of round and egg-shaped sewer pipes is investigated by means laboratory experiments finite element method analyses. Two different are considered, which have an inner diameter 400 mm 500 mm, respectively referred to as R400 R500 pipes. pipe considered in this study has a horizontal vertical 600 labeled the E400/600 pipe. Sewer with these dimensions most commonly used Nethe...

In this study, the bond behavior of corroded reinforced concrete was investigated by conducting pull-out tests on specimens with variable induced crack widths and different splitting modes. To simulate cracks due to corrosion focus their effect strength degradation, a novel method using expansion agent filled pipes is proposed. With increase width over elapsed time from filling aluminum pipe an...

Reinforced concrete pipes are exposed to environmental influences during the entire period of their operation. As a result, defects and damage appear reduce durability bearing capacity. In this regard, there is need repair strengthen them. order assess effectiveness strengthening reinforced pipes, it necessary get data about deformations that appeared as result loads on pipe. The method for con...

The construction industry generates a considerable amount of waste. Faced with this undesirable situation, the ready-mix concrete sector, in particular, has invested energy and resources into reusing its own waste in its production process as it works towards the goal of more sustainable construction. This study examines the feasibility of incorporating two types of concrete waste, which curren...

The susceptibility of structural concrete to early-age cracking depends on material composition, methods of processing, structural boundary conditions, and a variety of environmental factors. Computational modeling offers a means for identifying primary factors and strategies for reducing cracking potential. Herein, lattice models are shown to be adept at simulating the thermal-hygral-mechanica...

This paper presents the residual mechanical properties of concrete made with crushed bricks and clay roof tile aggregates after exposure to high temperatures. One referent mixture and eight mixtures with different percentages of replacement of natural aggregate by crushed bricks and roof tiles are experimentally tested. The properties of the concrete were measured before and after exposure to 2...

We analyze a signature scheme described in a recent Internet Draft, and highlight a variant (based on prior work of Micali and Leighton) that offers improved concrete security.

Recycled demolished concrete (DC) as recycled aggregate (RA) and recycled aggregate concrete (RAC) is generally suitable for most construction applications. Low-grade applications, including sub-base and roadwork, have been implemented in many countries; however, higher-grade activities are rarely considered. This paper examines relationships among DC characteristics, properties of their RA and...