div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentstone-this-alkali-usually-comes-from-common-grey-portland-cement-portland-cementhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: · stone This alkali usually comes from common grey Portland cement Portland cement is a constituent of the mortar used to set the stone as well as concrete block or concrete loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220422095ead1bc4ebbbb365792e1017html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentstone-this-alkali-usually-comes-from-common-grey-portland-cement-portland-cementhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: · stone This alkali usually comes from common grey Portland cement Portland cement is a constituent of the mortar used to set the stone as well as concrete block or concrete loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220422095ead1bc4ebbbb365792e1017html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentstone-this-alkali-usually-comes-from-common-grey-portland-cement-portland-cementhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: · stone This alkali usually comes from common grey Portland cement Portland cement is a constituent of the mortar used to set the stone as well as concrete block or concrete loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...