Cementing material, historic building repair mortar and preparation method of historic building repair mortar
A cementitious material and ancient building technology, applied in the field of ancient building repair mortar and its preparation, can solve the problems of irreplaceable repair mortar hydraulic lime and cement, iron tailings have no gelling performance, etc., to improve slump retention , good cohesion, and the effect of improving early strength
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Embodiment 1
[0031] This embodiment provides a cementitious material for ancient building repair mortar: components comprising the following parts by weight: 20 parts of slag and 500 parts of active iron tailings;
[0032] The preparation method of active iron tailings is: use a ball mill to grind the iron tailings to a specific surface area of 450㎡ / ㎏, add quicklime powder and water (the mass ratio of iron tailings, quicklime powder to water is 5:3.5:0.8) Mix and grind for 30 minutes, and activate the fully ground ultra-fine iron tailings and quicklime at a temperature of 700°C for 2 hours to obtain active iron tailings;
[0033] The slag is a slag powder with a specific surface area of 400㎡ / ㎏, an activity index of 110%, and a fluidity ratio of 96%.
Embodiment 2
[0035] This embodiment provides a cementitious material for ancient building repair mortar: components comprising the following parts by weight: 150 parts of slag and 250 parts of active iron tailings;
[0036] The preparation method of active iron tailings is: use a ball mill to grind the iron tailings to a specific surface area of 550㎡ / ㎏, add quicklime powder and water (the mass ratio of iron tailings, quicklime powder to water is 5:2.5:1.2) Mix and grind for 20 minutes, and activate the fully ground ultra-fine iron tailings and quicklime at a temperature of 800°C for 1 hour to obtain active iron tailings;
[0037] The slag is a slag powder with a specific surface area of 500㎡ / ㎏, an activity index of 100%, and a fluidity ratio of 98%.
Embodiment 3
[0039]This embodiment provides a cementitious material for ancient building repair mortar: components comprising the following parts by weight: 90 parts of slag and 370 parts of active iron tailings;
[0040] The preparation method of active iron tailings is: use a ball mill to grind the iron tailings to a specific surface area of 500㎡ / ㎏, add quicklime powder and water (the mass ratio of iron tailings, quicklime powder and water is 5:3:1) Mix and grind for 25 minutes, and activate the fully ground ultra-fine iron tailings and quicklime at a temperature of 750°C for 1.5 hours to obtain active iron tailings;
[0041] The slag is a slag powder with a specific surface area of 450㎡ / ㎏, an activity index of 105%, and a fluidity ratio of 97%.
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