A C 180 8Gelled sand-gravel construction material composition, method for its production and use

Abstract

The application provides a C 180 8 cemented sand gravel building material composition and preparation method and application. The composition comprises the following components: cement, fly ash, aggregate A, aggregate B, water, cemented sand gravel special additive, the cement, fly ash, aggregate A, aggregate B and water are weighed according to component allocation ratio, are uniformly mixed and stirred, then the cemented sand gravel special additive is added, is uniformly mixed and stirred, and the product is obtained. The prepared product breaks through the lithology, structure and physical properties of cemented sand gravel aggregate and expands the selection and use range of the cemented sand gravel aggregate, the mixing ratio of different aggregates is proposed, the structure and stress characteristics of the dam are combined, the cemented sand gravel aggregate is successfully applied to each partition part of the dam body, and a precedent of using extremely thin layer and thin layer phyllitic sericite slate as concrete aggregate is created.

Description

Technical Field

[0001] This invention relates to the field of rock dam technology, specifically to a C 180 8. Cemented gravel building material compositions, their preparation methods and applications. Background Technology

[0002] The concrete aggregates used in existing and under-construction water conservancy projects are generally made of limestone, dolomite, and other carbonate rocks with medium hardness and strong weathering resistance. With the advancement of technology in the water conservancy industry, increased awareness of ecological and environmental protection, and stricter control over land use for building materials, the approval process for concrete aggregate yards, building material mining, and land use permits is becoming increasingly stringent. Furthermore, the delineation of the "three zones and three lines" (referring to specific zones and boundaries for water conservancy projects) places higher demands on the layout of water conservancy projects, preliminary survey work, and the evaluation and selection of major schemes such as dam sites and dam types.

[0003] According to the dam design proposed by the China Institute of Water Resources and Hydropower Research for cemented gravel dams, most projects use riverbed sand and gravel as aggregate. While the rock is hard, well-graded, and well-rounded, the excavation process generates a large amount of waste material, necessitating the acquisition of new land for waste disposal sites. This not only increases project costs but also impacts the local natural environment. Therefore, this invention breaks with traditional methods. Based on the anisotropy of block density and strength of different excavated materials, it formulates cemented gravel mix proportions with the same strength. Combining the working and stress conditions of different parts of the dam body, it utilizes cemented gravel mix proportions with different aggregate physical properties to design the dam body in zones. This approach adapts to local geological and natural material conditions, fully utilizes conventional excavated waste material, and transforms waste into valuable resources. It uses extremely thin layers and thin layers of phyllite sericite slate as C... 180 8. Cemented sand and gravel aggregate, a C-type aggregate was developed. 180 8. Cemented gravel natural building materials not only meet the strength and stability requirements of cemented gravel dams, but also provide research and reference value for the selection and utilization of aggregates in other metamorphic rock, igneous rock and sedimentary rock areas. Summary of the Invention

[0004] The purpose of this invention is to provide a C 180 8. A natural building material composition of cemented sand and gravel.

[0005] Another object of the present invention is to provide a C 180 8. Preparation method of cemented gravel natural building material composition.

[0006] Another object of the present invention is to provide C 180 8. Application of cemented gravel natural building material compositions in overflow dam sections and / or non-overflow dam sections.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] The C of this invention 180 8. A cemented gravel natural building material composition, prepared from the following raw materials in parts by weight: 50-75 parts cement, 50-75 parts fly ash, 1420-1820 parts aggregate A, 398-725 parts aggregate B, 105-135 parts water, and 1-1.8 parts admixture.

[0009] Furthermore, the C described in this invention 180 8. A cemented gravel natural building material composition, prepared from the following raw materials in parts by weight: 55-70 parts cement, 55-70 parts fly ash, 1470-1738 parts aggregate A, 613-725 parts aggregate B, 110-130 parts water, and 1-1.6 parts admixture.

[0010] Furthermore, the C described in this invention 180 8. A cemented gravel natural building material composition, prepared from the following raw materials in parts by weight: 60-65 parts cement, 60-65 parts fly ash, 1516-1645 parts aggregate A, 665-673 parts aggregate B, 115-125 parts water, and 1-1.3 parts admixture.

[0011] Furthermore, the C described in this invention 180 8. A cemented gravel natural building material composition, prepared from the following raw materials in parts by weight: 60 parts cement, 60 parts fly ash, 1561 parts aggregate A, 669 parts aggregate B, 120 parts water, and 1 part admixture.

[0012] The aggregate described in this invention is an extremely thin-layered or thin-layered phyllitic sericite slate; the rock mass structure is phyllitic or platy; the maximum aggregate particle size is ≤200mm; the needle-like and flaky content is ≤38%; and the sericite content is 90%.

[0013] The aggregate A described in this invention has the following characteristics: aggregate particle size ≥ 5 mm; bulk density ≥ 2.25 g / cm³. 3 And the saturated uniaxial compressive strength R b ≥5MPa.

[0014] The aggregate B described in this invention has the following characteristics: aggregate particle size < 5 mm; bulk density ≥ 2.66 g / cm³. 3 And the saturated uniaxial compressive strength R b >30MPa.

[0015] The admixture described in this invention is a special admixture for cemented sand and gravel.

[0016] The C of this invention 180 8. A method for preparing a cemented gravel natural building material composition, comprising the following steps:

[0017] (1) Weigh out cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0018] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0019] The parts by weight mentioned in this invention refer to kg / m³ 3 .

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. This invention represents a breakthrough in the lithology, structure, and physical properties of cemented sand and gravel aggregates, expanding the selection and application scope of cemented sand and gravel aggregates. Under saturated conditions, the lower limits of the aggregate block density, compressive strength, and elastic modulus of this invention are lower than those of conventional concrete aggregates, while the water absorption, Poisson's ratio, and mica content of the block aggregates are higher than those of conventional concrete aggregates.

[0022] 2. This invention proposes different aggregate mix proportions and, combined with the structural and stress characteristics of the dam, has been successfully applied to various sections of the dam body, creating a precedent for using extremely thin-layered phyllite sericite slate as concrete aggregate. Attached Figure Description

[0023] Figure 1 Test reports on the physical properties and harmful impurities of aggregates (crushed stones) selected for conventional construction.

[0024] Figure 2 Test reports on the physical properties and harmful impurities of crushed stone aggregates selected for conventional construction.

[0025] Figure 3 : Test report on conventional properties of rock mass with aggregate size <5mm and ≥5mm in mix proportion 1 - 1

[0026] Figure 4 : Test report on conventional indicators of rock mass with aggregate size <5mm and ≥5mm in mix proportion 1 - 2

[0027] Figure 5 : Test report on conventional properties of rock mass with aggregate size ≥5mm in mix ratio 3 - 1

[0028] Figure 6 : Test report on conventional indicators of rock mass with aggregate size ≥5mm in mix ratio 3 - 2

[0029] Figure 7 Schematic diagram of mix proportions for non-overflow dam sections

[0030] Figure 8 Schematic diagram of the mix proportions for the overflow dam section. Detailed Implementation

[0031] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

[0032] Example 1

[0033] Formula: Cement 60kg / m³ 3 60kg / m³ of fly ash 3 Aggregate A 1561kg / m³ 3 Aggregate B 669kg / m 3 120kg / m 3 1 kg / m³ of admixture 3 .

[0034] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0035] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.66g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0036] The admixture is a special admixture for cemented sand and gravel.

[0037] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0038] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0039] Example 2

[0040] Formula: Cement 60kg / m³ 3 60kg / m³ of fly ash 3 Aggregate A 1516kg / m³ 3 Aggregate B 673kg / m 3 115 kg / m³ of water 3 1 kg / m³ of admixture 3 .

[0041] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0042] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0043] The admixture is a special admixture for cemented sand and gravel.

[0044] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0045] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0046] Example 3

[0047] Formula: Cement 65kg / m³ 3 65 kg / m³ of fly ash 3 Aggregate A 1738kg / m³ 3 Aggregate B 398kg / m 3 115 kg / m³ of water 3 1.3 kg / m³ of admixture 3 .

[0048] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0049] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0050] The admixture is a special admixture for cemented sand and gravel.

[0051] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0052] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0053] Example 4

[0054] Formula: Cement 50kg / m³ 3 50kg / m³ of fly ash 3 Aggregate A 1420kg / m³ 3 Aggregate B 398kg / m3 105 kg / m³ of water 3 1 kg / m³ of admixture 3 .

[0055] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0056] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0057] The admixture is a special admixture for cemented sand and gravel.

[0058] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0059] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0060] Example 5

[0061] Formula: Cement 75kg / m³ 3 75 kg / m³ of fly ash 3 Aggregate A 1820kg / m³ 3 Aggregate B 725kg / m 3 135 kg / m³ of water 3 1.8 kg / m³ of admixture 3 .

[0062] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0063] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0064] The admixture is a special admixture for cemented sand and gravel.

[0065] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0066] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0067] Example 6

[0068] Formula: Cement 55kg / m³ 3 55 kg / m³ of fly ash 3 Aggregate A 1470kg / m³ 3 Aggregate B 613kg / m 3 110 kg / m³ of water 3 1.0 kg / m³ of admixture 3 .

[0069] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0070] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0071] The admixture is a special admixture for cemented sand and gravel.

[0072] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0073] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0074] Example 7

[0075] Formula: Cement 70kg / m³ 3 70kg / m³ of fly ash 3 Aggregate A 1738kg / m³ 3 Aggregate B 725kg / m 3 130kg / m 3 Admixture 1.6kg / m 3 .

[0076] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0077] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength Rb >30MPa.

[0078] The admixture is a special admixture for cemented sand and gravel.

[0079] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0080] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0081] Example 8

[0082] Formula: Cement 60kg / m³ 3 60kg / m³ of fly ash 3 Aggregate A 1516kg / m³ 3 Aggregate B 665kg / m 3 115 kg / m³ of water 3 1 kg / m³ of admixture 3 .

[0083] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0084] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0085] The admixture is a special admixture for cemented sand and gravel.

[0086] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0087] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0088] Example 9

[0089] Formula: Cement 65kg / m³ 3 65 kg / m³ of fly ash 3 Aggregate A 1645kg / m³ 3 Aggregate B 673kg / m 3 125 kg / m³ of water 3 1.3 kg / m³ of admixture 3 .

[0090] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0091] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0092] The admixture is a special admixture for cemented sand and gravel.

[0093] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0094] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0095] Example 10

[0096] formula:

[0097] Cement 65kg / m 3 65 kg / m³ of fly ash 3 Aggregate A 1561kg / m³ 3 Aggregate B 673kg / m 3 120kg / m 3 1.3 kg / m³ of admixture 3 .

[0098] The aggregate A has a particle size of ≥5mm and a bulk density of ≥2.25g / cm³. 3 saturated uniaxial compressive strength R b ≥5MPa.

[0099] Aggregate B: Aggregate particle size <5mm; Bulk density ≥2.65g / cm³ 3 saturated uniaxial compressive strength R b >30MPa.

[0100] The admixture is a special admixture for cemented sand and gravel.

[0101] Preparation: (1) Weigh cement, fly ash, aggregate A, aggregate B and water according to the weight ratio, mix and stir evenly to obtain a mixture;

[0102] (2) Add the special additive for cementitious sand and gravel to the mixture obtained in step (1), mix and stir evenly to obtain the final product.

[0103] To further verify the feasibility and effectiveness of the embodiments of the present invention, the inventors conducted a series of experiments, as follows:

[0104] This invention proposes different aggregate mix proportions and, combined with the structural and stress characteristics of dams, has been successfully applied to various sections of the dam body. The cementitious gravel mix proportions and dam body zoning design are as follows:

[0105] I. Aggregates

[0106] (1) Rock type: Metamorphic rock;

[0107] (2) Aggregate lithology: extremely thin-layered, thin-layered phyllitic sericite slate;

[0108] (3) Rock mass structure: phyllitic or platy structure;

[0109] (4) Maximum aggregate size: ≤200mm;

[0110] (5) Aggregate A (≥5mm): Block density ≥2.25g / cm³ 3 And the saturated uniaxial compressive strength R b ≥5Mpa.

[0111] (6) Aggregate B (<5mm): Bulk density ≥2.66g / cm³ 3 And the saturated uniaxial compressive strength R b >30MPa.

[0112] (7) Needle-like and flaky content (%): ≤38%;

[0113] (8) Sericite content (%): <90%;

[0114] (9) Over- / under-diameter content (%): Small stones under-diameter content ≤46%, medium stones over-diameter content ≤15%;

[0115] (10) Medium diameter sieve residue rate (%): Small stone medium diameter sieve residue rate ≤78%, medium stone medium diameter sieve residue rate ≤5%;

[0116] The aggregates of this invention, specifically the small (5-20mm) and medium (20-40mm) stones, were tested. The results showed that the small (5-20mm) stones failed to meet the requirements of the "Specification for Construction of Hydraulic Concrete" SL677-2014 for oversized, needle-like, and flaky content, and medium-diameter sieve residue. Similarly, the medium (20-40mm) stones also failed to meet the requirements of the same specification. (See attached text.) Figures 1 to 2 Although it does not meet the construction specifications, it can be used as aggregate for cemented sand and gravel by proportioning it with other components. For details on its indicators and mix proportions, please refer to "II. C1808 Cemented Sand and Gravel Mix Proportion".

[0117] Under saturation conditions, the present invention selects aggregate blocks with lower limits of density, compressive strength, and modulus of elasticity that are lower than those of conventional concrete aggregates, while selecting aggregate blocks with higher water absorption, Poisson's ratio, and mica content. See Table 1 and Table 2.

[0118] Table 1. Aggregate properties (saturated state) of the present invention

[0119]

[0120] Table 2. Properties of conventional concrete aggregates (saturated state)

[0121]

[0122] II. C 180 8. Cemented gravel mix proportion

[0123] Mix proportion 1: Aggregate (≥5mm and <5mm) block density ≥2.66g / cm³ 3 saturated uniaxial compressive strength R b >30 MPa, original rock test report Figures 3-4 The physical properties of aggregate in mix proportion 1 are shown in Table 3, C 180 8. The mix proportions of cemented sand and gravel are shown in Table 4.

[0124] Table 3. Mix Proportion 1. Physical Properties of Aggregates

[0125]

[0126] Table 4C 180 8. Cemented gravel mix ratio 1

[0127]

[0128] Note: 1kg / m³ of special admixture for cemented gravel. 3 .

[0129] Mix proportion 2: Aggregate (≥5mm) with a block density of 2.5-2.6 g / cm³ 3 Furthermore, the saturated uniaxial compressive strength is 15-30 MPa; the aggregate (<5mm) block density is ≥2.66 g / cm³. 3 and saturated uniaxial compressive strength R b >30 MPa, see test report Figures 3-4 The physical properties of aggregate in mix proportion 2 are shown in Table 5, C 180 8. The mix proportions of cemented sand and gravel are shown in Table 6.

[0130] Table 5 Physical properties of aggregates in mix proportion 2

[0131]

[0132] Table 6C 180 8. Cemented gravel mix ratio 2

[0133]

[0134]

[0135] Note: 1kg / m³ of special admixture for cemented gravel. 3 .

[0136] Mix proportion 3: Aggregate (≥5mm) with a block density of 2.25-2.31g / cm³ 3 And the saturated uniaxial compressive strength Rb≥5MPa (test report available). Figures 5-6 (and bulk density ≥2.66 g / cm³) 3 And the saturated uniaxial compressive strength R b >30 MPa; aggregate (<5 mm) block density ≥2.66 g / cm³ 3 And the saturated uniaxial compressive strength R b >30 MPa, see test report Figure 3 and Figure 4 The physical properties of aggregate in mix proportion 3 are shown in Table 7, C 180 8. The mix proportions of cemented sand and gravel are shown in Table 8:

[0137] Table 7 Physical properties of aggregates in mix proportion 3

[0138]

[0139] Table 8C 180 8. Cemented gravel mix ratio 3

[0140]

[0141] Note: 1.3 kg / m³ of special admixture for cemented sand and gravel. 3 .

[0142] III. Dam Body Mix Proportion Zoning Design

[0143] Under the premise of meeting the requirements of dam anti-sliding stability and engineering safety, the dam body is divided into zones according to mix proportions 1, 2 and 3 for different dam sections and dam heights.

[0144] Specific design: Below the elevation of the cemented gravel gallery in the dam body, use C. 180 8. Cemented gravel mix ratio 1, gallery elevation to weir crest elevation using C 180 8. Cemented gravel mix ratio 2, the elevation of the weir crest to the dam crest is C 180 8. Cemented sand and gravel mix ratio 3, see design and usage diagram. Figures 7-8 .

[0145] Results: The field-formed specimens prepared according to mix proportions 1, 2, and 3 were used in the paving and compaction construction of the cemented dam of the Xijiang Reservoir in Leishan County, Qiandongnan Prefecture, Guizhou Province. The specimens showed good performance and met the requirements. The dam has now passed the safety impoundment assessment and the impoundment acceptance test, and a pre-acceptance meeting has been held.

[0146] This invention makes full use of and consumes the excavated stone materials at the engineering site, thereby reducing or eliminating engineering waste. This eliminates the need to select waste disposal sites and building material production areas, reducing the difficulty of resettlement and land acquisition for the owner, and truly achieving the advantages of saving engineering investment, environmental friendliness, and wide availability of dam construction materials.

Claims

1. A C 180 8 A cementitious sand gravel natural building material composition characterized by, It is prepared from the following raw materials by weight: cement 50-75 parts, fly ash 50-75 parts, aggregate A 1420-1820 parts, aggregate B 398-725 parts, water 105-135 parts, additive 1-1.8 parts; the aggregate is extremely thin layer, thin layer phyllosilicate mica slate, the rock body structure is phyllosilicate structure, the aggregate maximum particle size is ≤200mm, the needle flake content is ≤38%, the phyllosilicate content is 90%; aggregate A: the aggregate particle size is ≥5mm, the bulk density is ≥2.25g / cm 3 and saturated uniaxial compressive strength R b ≥5MPa; aggregate B: the aggregate particle size is <5mm, the bulk density is ≥2.66g / cm 3 and saturated uniaxial compressive strength R b >30MPa; the additive is: special additive for cemented sand and gravel.

2. The C of claim 1 180 8 A cementitious sand gravel natural building material composition characterized by, It is prepared from the following raw materials by weight parts: cement 55-70 parts, fly ash 55-70 parts, aggregate A 1470-1738 parts, aggregate B 613-725 parts, water 110-130 parts, additive 1-1.6 parts.

3. The C of claim 2 180 8 A cementitious sand gravel natural building material composition characterized by, It is prepared from the following raw materials by weight parts: cement 60-65 parts, fly ash 60-65 parts, aggregate A 1516-1645 parts, aggregate B 665-673 parts, water 115-125 parts, additive 1-1.3 parts.

4. The C of claim 3 180 8 A cementitious sand gravel natural building material composition characterized by, It is prepared from the following raw materials by weight parts: cement 60 parts, fly ash 60 parts, aggregate A 1561 parts, aggregate B 669 parts, water 120 parts, additive 1 part.

5. A C as claimed in any one of claims 1 to 4 180 8. A method of preparing a cementitious sand gravel natural building material composition, characterized by, It comprises the following steps: (1) the cement, fly ash, aggregate A, aggregate B and water are weighed and mixed, to obtain a mixture; (2) the special additive for cementing sand and gravel is added to the mixture obtained in step (1), and mixed to obtain the product.

6. A C 180 8 The cementitious sand gravel natural building material composition of claim 5 or the method of making of claim 5 180 8 Use of the cementitious sand gravel natural building material composition in an overflow dam section and / or a non-overflow dam section.

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