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Yes, adding water to concrete will increase its slump, so you should do so with caution. Always measure the slump of the concrete batch before you adjust it, and be sure not to add too much and push the slump too high. Doing so can cause the aggregate to separate, set inconsistently, or shrink.

In general, you can expect concrete to last 30 to 50 years. However, the type of concrete, site prep, and climate all affect how long concrete lasts. The proper removal of rocks and tree roots before installation can prevent cracks later on. While concrete takes little maintenance, repairing small cracks as they appear can also extend the life of the concrete.

Shrinkage in concrete stems from the evaporation of water from the mixture as it cures. Contractors mix concrete with the proper amount of water to account for a set level of shrinkage. When the process happens unevenly between the top and lower layers of concrete, shrinkage cracks are bound to form.

Concrete dries faster in the heat than in the cold, but when concrete cures too fast, it can cause weak concrete. It’s best to pour concrete when temperatures are between 50 and 85 degrees Fahrenheit, watering it five to 10 times per day for seven days (unless you pour concrete in the winter). Slower cure times, such as when pouring concrete in cold weather, can cause strong concrete, but you need to monitor the temperature drop and moisture levels. Avoid pouring concrete when temperatures are below 40 degrees Fahrenheit.