Taken together, the allegations in the three cases have raised concerns among regulators, construction industry officials and prosecutors that such improprieties are widespread in the concrete testing sector.
Carbonation is a widespread degradation of concrete and may be coupled with more severe degradations.
Simulations of the systems incorporated into a house were carried out and they were then compared to the most widespread technologies (solid concrete walls).
The search for substitute products thus appears important if the use of UHPC is to become more widespread in the concrete industry, e.g. in the fields of mechanical engineering (machine parts, tools, molds, etc).
The search for substitute products thus appears important if the use of UHPC is to become more widespread in the concrete industry, e.g. in the fields of mechanical engineering (machine parts, tools, molds, etc.) and civil engineering (pipes for water or waste water conveyance for example).
The case bears some similarities to one brought by the district attorney last year, which exposed widespread fraud in the concrete testing industry and led to criminal convictions and cost the city and private developers millions of dollars for retesting.
The earthquake provided the first hard evidence that millions of people in many of the world's most populous cities are at risk from earthquakes because of widespread use of reinforced concrete and substandard building practices, experts said.
There was widespread speculation, although no concrete evidence, that Alan Greenspan, the Fed chairman, would consider cutting rates well before the central bank's next scheduled meeting, on Oct. 2. In Congress, Republicans started drafting plans for a package of fiscal stimulus, including business tax breaks and a reduction in the capital gains rate.
The use of superplasticizers (SP) is widespread in today's concrete production.
However, there are still various uncertainties limiting the widespread use of recycled concrete (RC).
