1 liter (1/4 gallon) of gas in other cities. 1  In Accra the price is 39% lower than in Paris. 2  In Bristol the price is 9% higher than in Paris. 3  In Indore the price is 21% lower than in Paris.  In Ramallah the price is 27% higher than in 1  Paris. In Bhubaneswar the price is 24% lower than in Paris.  In Guatemala City the price is 42% lower than in Paris.
The hardening of concrete is a chemical reaction that requires certain conditions and temperatures. Ideally, concrete should be poured when the air temperature is between 50 and 90 degrees Fahrenheit. Cold temperatures slow the concrete-setting process, and when temperatures dip below freezing, the delay allows the water in the mix to freeze before the concrete hardens. This creates cracks in the concrete because water expands as it freezes.
Unfortunately, cracking is pretty common in concrete, especially during the first 30 days, while itâs curing. There are a number of reasons why concrete cracks. The most common is because concrete shrinks as the excess water evaporates and it hardens. Concrete can also crack if it dries too quickly. Weather conditions â extreme temperatures, rapid temperature changes or conditions that are too wet or too dry â also play a major factor in how well concrete cures. When the width of a crack exceeds 1/4â in width, it is probably time to seek professional assistance.