粗骨料粒径对混凝土动态压缩行为的影响研究 - cstam.cn
2022.3.4 different average particle sizes (6 mm, 12 mm and 24 mm) of coarse aggregate. A dual-pulse shaper was used in the tests for dynamic stress equilibrium and
More
Effect of coarse aggregate size on non-uniform stress/strain
2021.7.1 As the coarse aggregate size decreased from 16-20 mm to 5–10 mm, the average thickness of tensile stress shells decreased from 2.13 mm to 1.09 mm at the
More
Effects of coarse aggregates size on dynamic ... - ScienceDirect
2024.1.12 It can be found that when the maximum coarse aggregate size is no more than 10 mm, the flowability decreases to a limited extent, whereas the maximum coarse
More
Specific gravity of coarse aggregates (20mm) pycnometer
Download scientific diagram Specific gravity of coarse aggregates (20mm) pycnometer method as per IS: 383-1970 from publication: Brief Experimental Study on Self
More
Feasibility and performance analysis of carbonated recycled aggregate ...
2020.12.6 Natural Coarse Aggregate (NCA) Aggregates having a maximum size of 10 mm 20 mm, that are available from nearby sources are used in this research work.
More
骨料粒径对混凝土劈拉性能及尺寸效应影响的细观数值
对尺寸为150 mm、250 mm、350 mm和450 mm的混凝土立方体模型劈裂抗拉破坏行为进行细观数值模拟，探讨骨料粒径（最大粒径分别为：10 mm、20 mm、30 mm和40 mm）的影响机制，并与试验结果进行对比分析。
MoreEffect of Aggregate Size and Water/Cement on
2022.9.27 different aggregate gradations (10–30 mm, 20–40 mm) and water–cement ratios (0.25, 0.27, 0.29, 0.31, ... of the coarse aggregate and had a metallic luster.
More
Effect of sand-to-aggregate volume ratio on durability of
2022.9.1 Coarse aggregates give stability to concrete and fine aggregate mixed with cementing material and water also known as mortar binds them together. It is evident
More
Effects of aggregate sizes on the performance of laterized
2024.1.3 This research aims to validate and extend these findings, evaluating the impact of different aggregate sizes (12 mm, 20 mm, and 40 mm) on the strength of
More
How to Calculate Fineness modulus of aggregate
The weights retained in sieve of 40,32,20,16,10,4.75,are 0,1.2,1.8,0.5,1.5and 0 kg respectively. Obtain fineness modules for the sample. COMULATIVE % weight retained = (commutative weight
More
Coarse aggregate effectiveness in concrete ... - ScienceDirect
2021.6.28 P‧O 42.5 cement and class II fly ash were used as binders, and their chemical compositions are listed in Table 1.River sand with an apparent density of 2610 kg/m 3 was used as fine aggregate, and crushed limestone with an apparent density of 2690 kg/m 3 was used as coarse aggregate respectively. The coarse aggregate includes three
More
Feasibility and performance analysis of carbonated recycled aggregate ...
2020.12.6 Recycled coarse aggregates (RCA) of a maximum size of 10 mm 20 mm both were treated with CO 2 gas in the carbonation chamber to prepare Carbonated Recycled Coarse Aggregate (CRCA) of both sizes. To facilitate the carbonation process and to reduce free water content in aggregates, firstly the recycled coarse aggregates (RCA)
More
Effects of aggregate sizes on the performance of laterized
2024.1.3 With a 20 mm maximum coarse aggregate size, 25% laterite soil in fine aggregate yielded a compressive strength of 22.1 N/mm 2, aligning with the findings of Salau and Busari 13, and Ata 70.
More
Applied Sciences Free Full-Text Influence of Maximum Aggregate ...
2020.5.21 Depending on the dimensions of concrete elements, aggregates of different grain sizes are used for the building structures. Taking this fact into account, the authors of the paper have undertaken in their work an issue concerning the analysis of the influence of maximum aggregate grain size on the strength properties and modulus of
More
What Is Sieve Analysis Test Sive Analysis Test for Coarse Aggregate ...
2023.8.15 IS Sieves 20 mm, 16 mm,12.5 mm, 10 mm, 4.75 mm,2.36mm and pan – for Analysis of 10/12.5 metal. Weigh scale to the accuracy of 1gm; ... Procedure for coarse aggregate test and Sive Analysis Test for Coarse Aggregate: A sample of aggregate shall be collected as given earlier. Sieves shall be cleaned and arranged in sequence in
More
Effect of coarse aggregate size on non-uniform stress/strain
2021.7.1 Non-uniform stresses, strains and microcracking of the concretes with three coarse aggregate sizes (5–10 mm, 10–16 mm, 16–20 mm) dried under 40% relative humidity (RH) for 60 days were quantified using digital image correlation and lattice fracture modelling. The influencing mechanism of coarse aggregate size on the drying-induced
More
Coarse Aggregates: Types, Properites Applications
2024.1.9 1.Size of Coarse Aggregates: The size of the coarse aggregate depends on the use of the concrete is to be poured. For large-scale concreting operations without complex reinforcement, large aggregates of size 80 mm, 40 mm, 20 mm are used. For the simple construction of residential or other buildings, 20 mm is the maximum size will be
More
Proportioning of Concrete Mixes SpringerLink
2019.3.6 Now in case if single-sized 10 and 20 mm coarse aggregates are used, the coarse aggregate content is proportioned as 1:2. This will give us 414 kg/m 3 of 10 mm single-sized and 829 kg/m 3 of 20 mm single-sized aggregates. RESULT: The estimated quantities in kg/m 3 are found: Cement = 367. Fine aggregate = 585.
More
Modified pull-off test evaluation of bond properties in
As mentioned earlier, when the size of the coarse aggregate was reduced from 20 mm to 10 mm, the void content between the coarse aggregates decreased from 37.63 % to 28.55 %. With the reduction in grout content, the grout per surface area in the substrate/repair material interface is reduced, thereby decreasing the bond strength of the PAC ...
More
Utilization of a mixture of waste plastic materials and granite ...
2023.5.16 20 mm Coarse Aggregate = 186 L (For 50 mm of Slump) • For Every 25 Mm Increase Water Content 3% • Water Content = 197 Liter. 3.4.5. Calculation of Cement Content • Water Content / Water Cement Ratio • Cement Content = 197 / 0.5 = 394 kg • Since 394 Kg > 320 kg (Min cement content) 3.4.6. Aggregates Volume • Coarse
More
Gradation optimization and evaluation of AC-20 mixtures
2022.10.3 Moreover, the tests described in Section 1.3 are conducted to obtain the optimum fine aggregate content of the AC-20 mixture comprising coarse aggregates whose sizes are 16–19, 13.2–16, 9.5–13.2, and 4.75–9.5 mm with a composition of 37:16:23:24 and gradation-decreasing coefficient of 0.75.
More
Aggregates for Concrete
2017.8.5 E1-20 4.1—Variability in aggregates 4.2—Sampling ... aggregate and crushed stone coarse and fine aggregate are produced by crushing natural stone. Crushing, screening, ... That portion of an aggregate passing the 4.75 mm (No. 4) AGGREGATES FOR CONCRETE E1-3 sieve and predominantly retained on the 75 µm (No. 200) ...
More
Unit weight of 10mm, 12mm, 20mm 40mm coarse aggregate
2 天之前 Unit weight or density of 10mm, 12mm, 12.5mm, 20mm 40mm coarse aggregate/ crushed stone/ gravel/ coarse sand is ranging between 1425 kg/m3 to 1575 kg/m3, it means weight of 1 cubic meter of course aggregate is around 1425kg to 1575kg or 1.425 to 1.575 MT. It’s advisable to sample the coarse aggregates or crushed stone from
MorePermeability properties of self-compacting concrete with coarse ...
2014.1.31 The results showed that the proposed method was applicable to SCRAC with a 600–800 mm target slump-flow, 40–60 MPa target compressive strength, 0–100% RCA, 0 and 100% RS, and 5–10, 5–16, and 5–20 mm coarse aggregate sizes.
More
Effect of fine aggregate characteristics on the thresholds of
2016.7.30 The sieve sizes were 4.75 mm, 10 mm and 19 mm, i.e., secondary coarse aggregate, ... 0–100% RCA, 0 and 100% RS, and 5–10, 5–16, and 5–20 mm coarse aggregate sizes. Finally, SCRAC using the RCA and punching residues was successfully fabricated to further verify the feasibility of the proposed method. The proposed method
More
(PDF) Developing the Mass Concrete Mix based on IS10262:
2021.5.25 However, at cement contents between 425 and 450 kg/m 3, the strength and stiffness of concrete seem to be higher with 16 mm coarse aggregate. The maximum size of coarse aggregate ranges between 10 ...
MoreEffect of fine aggregate/coarse aggregate ratio on the fresh
2023.7.10 Results indicate that the slump flow increases with the increase in the coarse aggregate content. Stability, slump flow, are relative viscosity are the key parameters that govern the behavior of fresh concrete. The ratio 47% fine to 53% coarse satisfied those parameters and recorded 680 mm slump flow with t 50 equals 3.6 sec. The visual ...
More
Effects of steel fiber length and coarse aggregate maximum
2019.6.10 The coarse aggregate used was crushed stone with different maximum sizes (D max = 10 mm, 20 mm, 30 mm, and 40 mm). Four different steel fiber lengths ( l f = 30 mm, 40 mm, 50 mm, 60 mm) with hooked-end were used, all of which have a
More
ru/Плотность mm aggregate.md at main chonngyang/ru
Contribute to chonngyang/ru development by creating an account on GitHub.
More
Effect of sand, fly ash, and coarse aggregate gradation on
2015.9.15 The results demonstrate that although the compressive strength of PAC improved by around 20 % with the reduction in coarse aggregate size, the bond strength of PAC decreased by around 49 %. However, with the incorporation of SF, the bond strength improved by nearly 57 %, irrespective of the size of the coarse aggregate used.
More
Materials Free Full-Text Effect of Size of Coarse
2021.6.15 As the coarse aggregate size increased, the compressive strength of the OPC concrete increased. This trend ranged from 31.59 MPa for the 5–10 mm to 36.40 MPa for the 16–20 mm coarse aggregate size.
More
Experimental investigation on utilization of used foundry
2023.6.5 In this work, coarse aggregate with a maximum size of 20 mm that was found nearby was used as shown in Fig. 2. The coarse aggregate was tested according to IS:383-1970. First, the 20 mm aggregates were put through a 20 mm sieve 4.75 mm sieve [28]. Then they were washed to get rid of dust and dirt, and they were dried until the
More
Effect of fine aggregate/coarse aggregate ratio on the fresh
2023.7.10 The dolomite is a mixture of two sizes; size 1 (10 mm) and size 2 (20 mm) with a ratio of 1:1, respectively. Three ratios between fine to coarse aggregate were adopted; 44%: 56% for mix 1, 47%: 53% for mix 2, and 50%: 50% for mix 3, respectively.
More
Analysis and optimization of mechanical properties of
Three finite element models were constructed with the maximum aggregate size of 16, 20, and 31.5 mm and other constant parameters (coarse aggregate content: 40%, 50% regular round aggregates + 50% irregular polygonal aggregates) to analyze the mechanical properties of recycled concrete, and the peak stress and elastic modulus in the uniaxial ...
More
How Coarse Aggregate Affects Mix Design of Concrete?
The voids left by larger coarse aggregate particles are filled by smaller coarse aggregate particles. Proper grading of coarse aggregate can minimize the possibility of segregation, especially for higher workability and improves the compatibility of concrete. The coarse aggregate grading limits are given in ASTM C33/ C33M and IS 383 – 1970 ...
More
IOP Conference Series: Materials Science and
2022.5.21 Production and Utilisation of Artificial Coarse Aggregate in Concrete - a Review George K George1* and P Revathi2 ... sized with 14-20 mm are sintered at temperature 500 °C, 600 °C and 800 °C for 1 hour [5]. Various ... 200-300 mm thick GP is conveyed on the endless belt. The high volume of coal content, causing higher
More
(PDF) Effect of Aggregate Maximum Size upon Compressive
2017.7.20 Investigation was carried out to study the effects of maximum aggregate size (MAS) of recycled brick coarse aggregate (12.5 mm, 19.0 mm, 25.0 mm, and 37.5 mm) on compressive strength of concrete.
More
Influence of recycled coarse aggregate derived from construction
2017.7.1 However, 4.75–10 mm size range of RCA had about 27% of the aggregate finer than 4.75 mm. Therefore, coarse aggregate of this size range was used only after screening from 3 ... For Series 1 mixes, mix M30 developed maximum compressive strength followed by mix M31 where only 10–20 mm size coarse aggregate was replaced. Mix
More
(PDF) Effect of Maximum Aggregate Size on the Strength
2020.6.1 coarse aggregate of 20 mm maximum size and the increase in strength of co ncrete is proportio nal to the size of ... to 1:4:7 1:4:6 along with 40 mm downgraded coarse aggregate and 53 grade ...
More