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A technology of limestone machine-made sand and concrete modifier, applied in the fields of building material admixtures and road building materials, can solve problems such as poor wear resistance, and achieve the effects of wide application range, low cost, and improvement of compressive and flexural strength.
Inactive Publication Date: 2021-01-15
GUANGXI COMM PLANNING SURVEYING & DESIGNING INST
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[0004] However, since the chemical composition of manufactured sand made from limestone is mainly calcium carbonate, the wear resistance of manufactured sand cement concrete pavement based on limestone is worse than that of natural sand cement concrete pavement
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Embodiment 1
[0028] A limestone machine-made sand concrete modifier is made of the following raw materials in parts by mass:
[0029] 5 parts of nano colloidal silicon dioxide with a solid content of 50%, and 6 parts of lotus leaf type hydrophobic agent.
[0030] A concrete, the quality of the limestone machine-made sand concrete modifier in the concrete is 5% of the cement quality in the concrete, and it only needs to be mixed uniformly.
[0031] The construction method of above-mentioned a kind of concrete comprises the steps:
[0032] 1) Weigh the following components according to the proportion: ordinary Portland cement, limestone machine-made sand, limestone gravel, water, the above-mentioned limestone machine-made sand concrete modifier;
[0033] 2) Add the above-mentioned limestone machine-made sand concrete modifier into the weighed water and stir evenly to form a mixed solution, and then add it into a concrete mixer with other materials to obtain the concrete. (the construction ...
Embodiment 2
[0035] A limestone machine-made sand concrete modifier is made of the following raw materials in parts by mass:
[0036] 6 parts of nano colloidal silicon dioxide with a solid content of 50%, and 7 parts of water-based wax-based hydrophobic agent.
[0037] A concrete, the quality of the limestone machine-made sand concrete modifier in the concrete is 6% of the cement quality in the concrete.
Embodiment 3
[0039] A limestone machine-made sand concrete modifier is made of the following raw materials in parts by mass:
[0040] 7 parts of nano colloidal silicon dioxide with a solid content of 50%, and 4 parts of lotus leaf type hydrophobic agent.
[0041] A concrete, the quality of the limestone machine-made sand concrete modifier in the concrete is 7% of the cement quality in the concrete.
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Abstract
The invention discloses a limestone machine-made sand concrete modifier and concrete containing the limestone machine-made sand concrete modifier. The limestone machine-made sand concrete modifier isprepared from the following raw materials in parts by mass: 5-7 parts of nano colloidal silicon dioxide with the solid content of 15-50% and 4-7 parts of a water repellent agent, wherein the water repellent agent is selected from one of a lotus leaf type water repellent agent and a water-based wax-based water repellent agent. The preparation method comprises the following steps of carrying out fusion stirring according to 5%-7% of the mass of the cement, and uniformly stirring to obtain the novel limestone machine-made sand concrete modifier. According to the limestone machine-made sand concrete modifier, through the secondary hydration reaction, the crystal nucleus effect and the micro-aggregate filling effect of the material, the compressive strength, the breaking strength and the durability of concrete can be improved, and the limestone machine-made sand concrete modifier is simple in preparation process, low in cost and wide in application range.
Description
【Technical field】 [0001] The invention relates to the field of road building materials, in particular to the technical field of building material admixtures, in particular to a limestone machine-made sand concrete modifier and concrete containing the same. 【Background technique】 [0002] Cement concrete pavement is a kind of high-grade pavement. In recent years, it has occupied a considerable proportion in the road construction in my country, especially in the road sections with heavy traffic and heavy axle load. Natural sand is often used as fine aggregate in the construction of new cement concrete pavement. Natural sand refers to aggregates with a particle size in the range of 0-5mm. It is formed by the erosion of rock weathering and flowing water. Natural sand is a local non-renewable resource. . [0003] Due to the needs of infrastructure construction in China, there is a great demand for natural sand, so driven by interests, there are many cases of destroying fields an...
Claims
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