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Reinforcing material for soft roadbed and preparation method
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A technology for strengthening materials and weak roadbeds, applied in roads, roads, solid waste management, etc., can solve problems such as poor bearing capacity, and achieve the effects of increasing strength, increasing specific surface area, and stabilizing homogeneity
Active Publication Date: 2020-08-18
中电建路桥集团有限公司
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[0005] For this reason, the embodiment of the present invention provides a reinforcement material for a weak subgrade and a preparation method. By pretreating the clay and mixing it with cement and other materials, the overall rheology can be improved, so that the entire reinforcement material can
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preparation example Construction
[0043] Such as figure 1 Shown, the present invention also provides a kind of preparation method according to the reinforcing material of above-mentioned weak subgrade, comprising:
[0044] S100, under the condition of a pressure of 1-2 MPa, soak and stir the clay in water to obtain a slurry;
[0045] S200, taking out the slurry after being cyclically magnetized for 2-3 times, adding fibers thereto for whipping to obtain a mixed slurry;
[0046] S300, after stirring and mixing cement, mixed slurry, fly ash and water, component A is obtained;
[0047] S400, soaking the slag in an acid solution, washing it with water, and then calcining it at a temperature of 300-600° C., then taking it out, adding an aqueous solution of sodium carbonate to it and ball milling to obtain component B;
[0048] S500, mixing component A and component B according to the volume ratio of 5-10:1 to prepare a reinforcing material for weak roadbed.
[0049] In a further preferred embodiment, in order to f...
Embodiment 1
[0065] The clay is placed in water under normal pressure (it is enough to immerse the clay in water, and the proportioning is carried out according to 20 parts by weight of clay and 30 parts by weight of water) at a stirring rate of 500r / min, while stirring at a stirring rate of 0.5MPa / h The pressure increase rate is increased to 1MPa, and the temperature is raised to 60°C at a temperature increase rate of 30°C / h; then under the conditions of 1MPa and 60°C, stir at a stirring rate of 200r / min for 6h, and then stir at a stirring rate of 60r / min Stir at a high speed for 6 hours, alternately until the total time is 48h; then adjust the stirring rate to 100r / min, and reduce the pressure to normal pressure at a rate of 0.8MPa / h, and reduce the temperature at a rate of 50°C / h Be down to room temperature, obtain slurry;
[0066] The slurry was cyclically magnetized 3 times (each magnetization time was 20 minutes), and then taken out, and 1 part by weight of fiber was added thereto fo...
Embodiment 2
[0071] The preparation was carried out as in Example 1, except that the preparation of the slurry was simply placed under the conditions of 1MPa and 60°C, and stirred at a stirring rate of 200r / min for 48h to obtain the reinforcement material A2 for the weak roadbed.
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Abstract
The embodiment of the invention discloses a reinforcing material for a soft roadbed and a preparation method. The reinforcing material comprises cement, clay, slag, fibers, fly ash, sodium carbonate and water. The preparation method comprises the following steps: putting clay in water to be soaked and stirred, and obtaining slurry; magnetizing the slurry, and adding fibers; stirring and mixing cement, the mixed slurry, fly ash and water to obtain a component A; soaking the slag in an acid solution, washing with water, calcining, taking out, and carrying out ball milling to obtain a component B; and mixing the component A and the component B to prepare the reinforcing material for the soft roadbed. According to the invention, the clay is pretreated, so that the overall rheological propertycan be improved, the whole reinforcing material can better permeate, meanwhile, the strength of the overall reinforcing material is improved by processing the slag, the setting rate of the overall reinforcing material is increased, and the problems of poor bearing capacity, non-uniform pouring and the like caused by air shrinkage and the like are avoided.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of comprehensive reinforcement and treatment of roadbeds, in particular to a reinforcement material for weak roadbeds and a preparation method thereof. Background technique [0002] Weak subgrade mainly refers to the subgrade composed of silt, silty soil, flush fill, miscellaneous fill or other highly compressible soil layers, which often have problems such as high natural water content and low bearing capacity. Expressways in plain areas During the construction process, such subgrades need to be treated before continuing to build roads. [0003] The existing treatment methods are often to reinforce such weak subgrades, and the methods used often include preloading, pile filling, and grouting reinforcement. The method of perfusion reinforcement is widely used because it can improve the roadbed as a whole. The perfusion reinforcement materials in the prior art generally include ino...
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