Abstract
The castables with low-cement and normal quantity cement in its composition physical and mechanical properties was investigated. Aggregates of recycled shamotte waste, which are characterised by high water absorption, were used for castables. The results of influence of firing temperature on density and cold crushing strength for three series castables were determined (Fig 1 and 2). Thermal shock resistance, bending strength and deformations of the castables were investigated additionally (Table 2 and Fig 4). The results of investigations showed the advantage of low-cement castables: better thermal shock resistance, higher cold crushing and bending strength after firing at high temperature. The properties of developed low-cement and traditional castables produced with schamotte waste aggregates were compared with the data from German, Danish and Polish castables, a special quality shamotte aggregate was used (Table 1). Low-cement castable based on shamotte waste aggregates were developed and used for producing “Ipsen” furnace lining items.
Highlights
Aggregates of recycled shamotte waste, which are characterised by high water absorption, were used for castables
The results of investigations showed the advantage of low-cement castables: better thermal shock resistance, higher cold crushing and bending strength after firing at high temperature
The properties of developed low-cement and traditional castables produced with schamotte waste aggregates were compared with the data from German, Danish and Polish castables, a special quality shamotte aggregate was used (Table 1)
Summary
Betono stiprio lenkiant priklausomybe nuo kaitinimo ir ausinimo ciklq skaiCiaus. Po 3 ir 7 ausinimo ciklq mazacemencio betono bandiniai taip pat gerokai stipresni, bet jq stiprio kritimo kreive staigesne, gal del tankesnes betono struktiiros. Todel mazacemencio betono santykinio terminio patvarumo dydis yra lygiavertis tradicinio Nr. 2 betono dydziui. Ausinant bandinius oro ir vandens ciklais, pastebeta, kad mazacemencio betono terminis patvarumas yra didesnis. IS antros lenteles duomenq matyti, kad maZ:acementis betonas, palyginti su tradiciniu betonu, skiriasi didesne deformacija. Rentgenografiniais tyrimais nustatyta, kad, veikiant aukStoms temperatiiroms, amorfine faze siame betone labai maZ:eja, matyt, del struktiiros traukimosi kristalizacijos procese.
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