The Economics of Agricultural Policy.

Stone consolidating materials :

“…In another example, a poor quality dolomite limestone was used in the construction of the British Houses of Parliament [50] which eventually had to be replaced with a more durable limestone [15] . It is doubtful that a stone consolidant can make a poor quality stone durable and, as with the above example, stone replacement can be at times the most rational approach [52] .…”

“…Further, Marsh [50] pointed out that replacing a constituent of stone with another of a larger molecular volume can cause dilation stresses leading to cracking.…”

“…Little success has been achieved in consolidating stone with inorganic materials, and in some cases their use has greatly accelerated stone decay [16,50,78].…”

“…Some of the reasons given for the poor performance of inorganic consolldants are their tendencies to produce shallow and hard crusts [16,60,76], the formation of soluble salts as reaction by-products [1,16,60,86,87], growth of precipitated crystals [50], and the questionable ability of some of them to bind stone particles together [6,85]. Of by anistropic crystal growth [16].…”

“…Sleater [12] recently tested over 50 stone preservatives and found that none of them gave satisfactory performance.…”