Cement stabilized macadam base material suitable for high-cold and high-altitude areas and preparation method of cement stabilized macadam base material
A technology for cement-stabilized crushed stone and base material, applied in the field of cement-stabilized crushed stone material, can solve the problems of increasing the cracking of cement-stabilized crushed stone base material and affecting the performance, so as to broaden the utilization methods, improve the early strength, and reduce the early cracking. Effect
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[0030] The present invention also provides a preparation method for the above-mentioned cement-stabilized crushed stone base material, comprising the following steps:
[0031] (1) mixing cement, limestone gravel and the first part of water to make aggregate;
[0032] (2) Add brucite fiber, early strength agent and remaining water to the aggregate and mix to obtain the cement-stabilized crushed stone base material.
[0033] Preferably, the mass fraction of the first part of water is 1 / 5 of the total mass fraction of water.
[0034] Preferably, the mixing in the step (1) adopts stirring, and the stirring time is 5 minutes, and the mixing in the step (2) adopts stirring, and the stirring time is 3 minutes.
Embodiment 1
[0037] The preparation method of cement stabilized crushed stone base material comprises the following steps:
[0038] In parts by weight, 7 parts of cement, 71 parts of limestone gravel (with a particle size of 10-12mm) and 0.8 parts of water were mixed and stirred for 3 minutes to make aggregate; then 2 parts of brucite fiber, 16 parts of early strength agent and 3. Add 2 parts of water into the aggregate and mix for 3 minutes to obtain the cement-stabilized crushed stone base material.
[0039] Among them, according to the mass percentage, the chemical composition of the early strength agent is: SiO 2 11.8%, MgO 2.6%, Al 2 o 3 14.4%, Fe 2 o 3 9.7%, CaO 44.6%, SO 3 16.9%.
[0040] In terms of mass percentage, the chemical composition of brucite fiber is: SiO 2 1.6%, MgO 64.06%, Fe 2 o 3 0.8%, FeO 4.8%, CaO 0.14%, Na 2 O 0.06%, K 2 O 0.17%, Al 2 o 3 0.27%, H 2 O 28.1%.
[0041] The density of brucite fiber is 2.4g / cm 3 , The tensile strength of monofilame...
Embodiment 2
[0043]The preparation method of cement stabilized crushed stone base material comprises the following steps:
[0044] In parts by weight, 6 parts of cement, 71 parts of limestone gravel (with a particle size of 10-12mm) and 0.6 parts of water were mixed and stirred for 5 minutes to make aggregate; then 4 parts of brucite fiber, 16 parts of early strength agent and Add 2.4 parts of water into the aggregate and mix for 3 minutes to obtain the cement-stabilized crushed stone base material.
[0045] Wherein, the early strength agent and brucite fiber used are the same as those in Example 1.
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