An increase in either of these physiological components (cardiac output or TPR) causes a rise in the mean arterial pressure. Vasodilation works to decrease TPR and blood pressure through relaxation of smooth muscle cells in the tunica media layer of large arteries and smaller arterioles.
Contractors' prices for 2-4 hours with heavy equipment removing a small area of concrete (such as a 8x10-foot patio 4-8 inches thick) start around $250-$550 and go up. Removing an average driveway is $1,000-$2,500 and up, particularly if it's reinforced concrete. Prices vary considerably by region.
1 If the damage is extensive, repaving may be necessary. 2  A newly paved driveway can cost $600-$3,000 for gravel, macadam or black asphalt for a small 12x50 (600 square foot) surface, and can run two to three times as much for materials like concrete or cobblestones. The cost is about $10 a gallon. 2  To fill holes, you must clean away the debris, fill the hole with a patching material (prices range from $5 to $9 for a 60-pound bag) and then tamp the material down to compress it as much as possible.