High-performance slag powder admixture

Abstract

The invention discloses a high-performance slag powder admixture which comprises ordinary Portland cement and slag powder, and the ordinary Portland cement and the slag powder are mixed according to a scientific proportion to prepare the high-performance slag powder admixture. The ordinary Portland cement and the slag powder are mixed according to a scientific ratio, the grading of the high-chromium microspheres is scientifically adjusted, and the high-efficiency energy-saving processing and grinding process is adopted, so that the high strength of the cement and the high activity of the slag powder are fully combined, the strength is higher than that of the ordinary Portland cement, and the activity is higher than that of the slag powder; and synergistic enhancement of strength and activity is realized.

Description

Technical Field

[0001] The invention relates to the technical field of engineering materials, in particular to a high-performance slag powder admixture. Background Art

[0002] As an important component of building base materials, the performance of slag powder admixtures directly affects the strength, durability and economy of concrete. Currently, most slag powder admixtures on the market use single slag powder or simple compounding processes. Although they have certain activity, they still have obvious deficiencies in strength improvement, synergistic effect of activity factors and cost control. For example, the early strength development of traditional slag powder admixtures is slow, and the activity index is low, which leads to the need for concrete to rely on high cement content to ensure strength. This not only increases production costs, but also easily causes problems such as excessive hydration heat and shrinkage cracking. In addition, the admixture ratio in the existing technology lacks scientific optimization, making it difficult to take into account the dual requirements of high strength and high activity, which restricts its application in high-performance concrete.

[0003] Therefore, we propose a high-performance slag powder admixture to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a high-performance slag powder admixture to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-performance slag powder admixture, comprising: ordinary Portland cement and slag powder, wherein the ordinary Portland cement and slag powder are mixed according to a scientific ratio to prepare the high-performance slag powder admixture.

[0006] Preferably, the ratio of ordinary Portland cement and slag powder is 50%.

[0007] Preferably, the ordinary Portland cement and slag powder are mixed and then processed and ground into a high-performance slag powder admixture.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. By mixing ordinary Portland cement and slag powder in a scientific ratio of 50%, and using an efficient and energy-saving grinding process, the high strength of cement and the high activity of slag powder are fully combined. Experimental data shows that the three-day compressive strength of the admixture reaches 33.2MPa, and the 28-day strength is increased to 68.8MPa (compared to 58.5MPa of ordinary Portland cement). The activity index is also significantly better than that of traditional slag powder, achieving a synergistic enhancement of strength and activity.

[0010] 2. Adding this admixture to commercial concrete can reduce the cement content by 50% (compared to P·O42.5 cement), while improving the density and appearance quality of the concrete, reducing the hydration heat and shrinkage risk, and significantly reducing the overall production cost;

[0011] 3. By improving the utilization rate of slag powder, reducing industrial solid waste emissions, saving energy and reducing carbon emissions, it is in line with the development trend of green building materials; its high strength characteristics can extend the life of building structures, reduce maintenance costs, and create higher long-term economic value;

[0012] 4. The preparation process of the present invention is simple and can be directly scaled up by existing grinding equipment without the need for additional complex processes, making it easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a preparation flow chart of the present invention. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] See also Figure 1 This embodiment provides a technical solution: a high-performance slag powder admixture, comprising: ordinary Portland cement and slag powder, which are mixed according to a scientific ratio. In this embodiment, ordinary Portland cement and slag powder are mixed at a ratio of 50%, and then processed and ground into a high-performance slag powder admixture to form a new type of building material;

[0016] The strength factor of ordinary Portland cement and the activity factor of slag powder are fully utilized to form a new type of composite material, which has higher strength than ordinary Portland cement and higher activity than slag powder.

[0017] Adding an appropriate amount of high-performance slag powder admixture to commercial concrete can significantly reduce the amount of cement used in concrete, increase the density of the building base material, improve the appearance quality of engineering products, reduce production costs, and improve economic benefits. Its high strength and high activity can fully guarantee the quality of concrete, while ensuring product quality, creating higher economic value.

[0018] The comparative example is ordinary Portland cement

[0019] The comparison table of the compressive strength of ordinary cement P·O42.5 and high performance slag powder admixture is as follows:

[0020] type Three-day strength MPa Twenty-eight-day strength MPa Ordinary cement P·O42.5 28.7 59.7 High performance slag powder admixture 25.7 69.5

[0021] Although the initial compressive strength of ordinary cement P·O42.5 is relatively high, the compressive strength of the high-performance slag powder admixture of this embodiment is greatly improved after solidification.

[0022] This shows that the high-performance slag powder admixture of the present invention has high compressive strength.

[0023] The comparison table of compressive strength of Henggao P·O42.5 and high performance slag powder admixture is as follows:

[0024] type Three-day strength MPa Twenty-eight-day strength MPa Henggao P·O42.5 31.3 58.6 High performance slag powder admixture 29.2 65

[0025] Although the compressive strength of Henggao P·O42.5 is relatively high, the compressive strength of the high-performance slag powder admixture of this embodiment is greatly improved after solidification in the later stage.

[0026] The comparison table of compressive strength of Shanshui P·O42.5 and high performance slag powder admixture is as follows:

[0027] type Three-day strength MPa Twenty-eight-day strength MPa Landscape P·O42.5 27.0 61.1 High performance slag powder admixture 27.6 70.8

[0028] The compressive strength of the high-performance slag powder admixture of this embodiment is higher than that of Shanshui P·O42.5 in both the early and late stages.

[0029] The comparison table of compressive strength of Yinsheng P·O42.5 and high performance slag powder admixture is as follows:

[0030] type Three-day strength MPa Twenty-eight-day strength MPa Yinsheng P·O42.5 31.4 60.6 High performance slag powder admixture 22.8 70.1

[0031] Although the compressive strength of Yinsheng P·O42.5 is relatively high, the compressive strength of the high-performance slag powder admixture of this embodiment is greatly improved after solidification in the later stage.

[0032] The comparison table of compressive strength of Jidong P·O42.5 and high performance slag powder admixture is as follows:

[0033] type Three-day strength MPa Twenty-eight-day strength MPa Hebei East P·O42.5 28.2 52.9 High performance slag powder admixture 27.6 67.4

[0034] Although the compressive strength of Jidong P·O42.5 is relatively high, the compressive strength of the high-performance slag powder admixture of this embodiment is greatly improved after solidification in the later stage.

[0035] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high performance slag powder admixture, characterized in that: include: Ordinary Portland cement and slag powder are mixed according to a proportion to prepare a high-performance slag powder admixture.

2. The high performance slag powder admixture according to claim 1, characterized in that: The proportion of the ordinary Portland cement and the slag powder is 50%.

3. The high performance slag powder admixture according to claim 1, characterized in that: The ordinary Portland cement and slag powder are mixed and processed and ground into high-performance slag powder admixture.

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