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A platform for research: civil engineering, architecture and urbanism
Controllable low-strength material prepared from waste lightweight concrete and preparation method of controllable low-strength material
The invention discloses a controllable low-strength material prepared from waste lightweight concrete and a preparation method of the controllable low-strength material. The controllable low-strength material comprises a solid material, an additive and mixing water, the solid material comprises 15%-25% of a gel material and 75%-85% of fine aggregate; the fine aggregate comprises recycled fine aggregate and machine-made sand; the recycled fine aggregate is waste lightweight concrete fine aggregate, the machine-made sand accounts for 0-20% of the mass of the fine aggregate, and the recycled fine aggregate accounts for 80-100% of the mass of the fine aggregate. According to the invention, the waste lightweight concrete is used as a main component of the fine aggregate, and through reasonable proportioning design, a controllable low-strength material with fluidity of 200-320 mm, bleeding rate of less than 3% and unconfined compressive strength of greater than 0.3 MPa and less than 2.1 MPa is successfully prepared. Compared with a traditional backfill material, the CLSM has the characteristics of self-leveling and self-compacting, and has a good application prospect. The concrete can smoothly reach a narrow backfill construction area, does not need to be compacted again, is small in dry shrinkage, and guarantees the backfill construction quality.
本发明公开了一种利用废弃轻质混凝土的可控低强度材料及制备方法，该可控低强度材料包含固体材料、添加剂和拌合水；所述固体材料包括凝胶材料15％～25％，细骨料75％～85％；所述细骨料包括再生细骨料和机制砂；所述再生细骨料为废弃轻质混凝土细骨料，所述机制砂占细骨料质量的0％～20％，再生细骨料占细骨料质量的80％～100％。本发明通过将废弃轻质混凝土作为细骨料的主要成分，再通过合理的配比设计，成功制备出一种流动度为200～320mm、泌水率＜3％、无侧限抗压强度大于0.3MPa且小于2.1MPa的可控低强度材料，相对于传统回填材料，该CLSM具备自流平、自密实的特性，能顺利到达回填施工狭窄区域，且不需再压实处理，干缩小，保证了回填施工质量。
Controllable low-strength material prepared from waste lightweight concrete and preparation method of controllable low-strength material
The invention discloses a controllable low-strength material prepared from waste lightweight concrete and a preparation method of the controllable low-strength material. The controllable low-strength material comprises a solid material, an additive and mixing water, the solid material comprises 15%-25% of a gel material and 75%-85% of fine aggregate; the fine aggregate comprises recycled fine aggregate and machine-made sand; the recycled fine aggregate is waste lightweight concrete fine aggregate, the machine-made sand accounts for 0-20% of the mass of the fine aggregate, and the recycled fine aggregate accounts for 80-100% of the mass of the fine aggregate. According to the invention, the waste lightweight concrete is used as a main component of the fine aggregate, and through reasonable proportioning design, a controllable low-strength material with fluidity of 200-320 mm, bleeding rate of less than 3% and unconfined compressive strength of greater than 0.3 MPa and less than 2.1 MPa is successfully prepared. Compared with a traditional backfill material, the CLSM has the characteristics of self-leveling and self-compacting, and has a good application prospect. The concrete can smoothly reach a narrow backfill construction area, does not need to be compacted again, is small in dry shrinkage, and guarantees the backfill construction quality.
本发明公开了一种利用废弃轻质混凝土的可控低强度材料及制备方法，该可控低强度材料包含固体材料、添加剂和拌合水；所述固体材料包括凝胶材料15％～25％，细骨料75％～85％；所述细骨料包括再生细骨料和机制砂；所述再生细骨料为废弃轻质混凝土细骨料，所述机制砂占细骨料质量的0％～20％，再生细骨料占细骨料质量的80％～100％。本发明通过将废弃轻质混凝土作为细骨料的主要成分，再通过合理的配比设计，成功制备出一种流动度为200～320mm、泌水率＜3％、无侧限抗压强度大于0.3MPa且小于2.1MPa的可控低强度材料，相对于传统回填材料，该CLSM具备自流平、自密实的特性，能顺利到达回填施工狭窄区域，且不需再压实处理，干缩小，保证了回填施工质量。
Controllable low-strength material prepared from waste lightweight concrete and preparation method of controllable low-strength material
一种利用废弃轻质混凝土的可控低强度材料及制备方法
LIN FENG (author) / LIN ZHIYANG (author) / FANG MINGJING (author) / DANG YUN (author) / SUN LIANG (author)
2023-06-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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