- The Tu-144 supersonic transport was the fastest commercial jet plane at Mach 2.35 (1,555 mph, 2,503 km/h). It went into service in 1975, but soon stopped flying. The Mach 2 Concorde aircraft entered service in 1976 and flew for 27 years. - Wiki â Mark Mayo â¦ Apr 6 '13 at 21:39
There are several ways to address expansion joints and cracks as a result of shrinkage. The most obvious way to fill expansion joints is to fill the joint with a flexible joint sealant.The most cost effective joint sealants are usually single component urethane joint sealants. The may be supplied in caulking tubes or in bulk packaging.he most obvious way to fill expansion joints is to fill the joint with a flexible joint sealant. The most cost effective joint sealants are usually single component urethane joint sealants.
11. Sweep coarse masonry sand into the cracks between the stones after the concrete cures. You can also use polymeric sand and spray it gently with a mist of water; the polymers in the sand cause it to harden as it dries. For a more casual look, fill in the cracks with soil and sow grass seed in the soil.1  Dig This.. Scoop the colored concrete mix onto the walkway mold and use a small hand tool such as a mason's trowel to push it into each of the holes that comprise the mold. One 80-pound bag of concrete mix fills one 2-by-2-foot stone walkway mold.