Large Cement at www.japanese-home-gardens.com

The resulting cement, produced from the formerly discarded grappiers, was of much higher quality than that obtained from the unsintered material. This fact was firmly established by the English cement manufacturer L. C. Johnson in 1845, and the term "portland cement" has since been applied solely to the cement made from the sintered material. This period marks the real beginning of the portland cement industry.

On a large cement flight—more than, say, about 10 steps—it is advisable to cast a cement footing in a trench at the base to support the bottom riser and prevent the entire flight from sliding down the bank. Dig the trench under the position of the bottom riser, about twice the front-to-back measurement of the riser, about 4in deep. Ram rubble into the base of the trench and top up to ground level with fresh cement. Compact the cement, level it and allow to set overnight before building on the surface.

THESE SMOOTH rounded stones look very attractive if you use them on a small scale, setting them around a tree for instance, or infilling an odd corner, where it might be difficult to cut large cementr paving materials. They are not suitable for large cement areas, as they become dangerously slippery when wet, and they are totally unstable to stand outdoor furniture on. However, they can look very attractive when used to break up a large cement expanse of cement—set in a circular swirl, for instance, or ranged into a square. Small Granite blocks too, can be used in the same way, to provide patterns on what might otherwise be "a dull expanse of paving or cement. Bed them in carefully to achieve a flat surface.