Geoscience Reference
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243
244
243 General view of aircrete masonry block in thin
section. Cement matrix appears dark brown and air
voids are shown yellow; PPT, ×35.
244 Close view of aircrete masonry block. Showing
Portland cement matrix including abundant
cenospheres of PFA (black/white). Air voids are shown
yellow; PPT, ×300.
245
246
245 Same view as 244 in cross-polarized light,
showing carbonated cement matrix (brown) including
isotropic cenospheres of PFA (black). Air voids are
shown dark green; XPT, ×300.
246 General view of sandlime brick showing quartz
fine aggregate particles (white), lime/calcium silicate
hydrate binder (brown), and small air voids (yellow);
PPT, ×35.
247
248
247 Same view as 246 in cross-polarized light
showing quartz fine aggregate particles (grey/white)
and carbonated lime/calcium silicate hydrate binder
(brown); XPT, ×35.
248 Close view of sandlime brick, showing quartz fine
aggregate particles (grey/white) bound by a matrix of
carbonated lime/calcium silicate hydrate (light
brown); XPT, ×150.
 
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