Clinker-free cementing material

Abstract

The present invention relates to a clinker-free binder, which mainly comprises rotary kiln stone powder, furnace stone powder, and gypsum. The specific surface area of ​​the aforementioned three components after grinding is controlled between 3800 and 6000 cm² / g, so that they can be mixed and blended in a specific ratio to form a clinker-free binder. When the aforementioned binder is applied to concrete, it can replace cement as a substitute material, effectively achieving the reuse of waste materials and improving the overall economic value and benefits.

Claims

1. A clinker-free binder, mainly comprising a mixture of rotary kiln stone powder, furnace stone powder, and gypsum; wherein, The rotary kiln stone powder accounts for 10-40 wt% of the cementitious material, while the kiln stone powder accounts for 47-83 wt% of the cementitious material, and the gypsum accounts for 7-13 wt% of the cementitious material. The specific surface area of ​​the rotary kiln stone powder, the kiln stone powder, and the gypsum after grinding is 3800-6000 cm2 / g.

2. The binder without clinker as described in claim 1, further comprising an agent, wherein the amount of the agent added is 3 to 10 wt% (by weight) of the binder.

3. The cementitious material without clinker as described in claim 1 or 2, further contains limestone powder, wherein the amount of limestone powder added accounts for 1 to 5 wt% (by weight) of the cementitious material.

4. The clinker-free adhesive material according to claim 2, wherein, The agent is an alkaline activator, which has sodium silicate, sodium hydroxide, or a combination thereof.

5. The clinker-free adhesive material according to claim 1, wherein, The rotary converter stone powder is obtained through a process comprising: a collection step, which includes a converter stone molten slag produced in a steelmaking process; and a crushing and stabilization step, which includes a rotary device, a plurality of iron balls and water disposed within the rotary device. The aforementioned converter stone molten slag is poured into the rotary device, and with the addition of water, the converter stone molten slag forms converter stone slag blocks upon contact with water and air. During the rotation of the rotary device, the iron balls collide with the converter stone slag blocks due to gravity and rotational kinetic energy, thereby achieving crushing, preliminary stabilization, and activity enhancement of the converter stone slag blocks, thus initially obtaining the rotary converter stone raw material. The process includes a re-crushing step, equipped with a crushing device for re-crushing the rotary converter stone raw material. By utilizing the inherent moisture content of the rotary converter stone raw material and the heat generated during crushing, a second stage of stabilization is achieved, forming fine rotary converter stone particles. A screening step, equipped with a screening device, separates the fine rotary converter stone particles by particle size to obtain rotary converter stone powder of different particle sizes. A grinding step, equipped with a grinding device, grinds the obtained rotary converter stone powder of different particle sizes to a specific surface area of ​​approximately 3800~6000 cm² / g.

6. The clinker-free adhesive material according to claim 5, wherein, The maximum particle size of the raw material for the rotary converter stone is less than 1 cm, while the maximum particle size of the rotary converter stone powder is less than 0.5 cm.

7. The clinker-free adhesive material according to claim 1, wherein, The gypsum may be natural gypsum, power plant gypsum, desulfurization gypsum, or a combination thereof.

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