We sourced two soils with contrasting levels of aggregation (Table S1), physical, and chemical properties collected from the Long-Term Ecological Research site at the Konza Prairie Biological Station (KPBS) in eastern Kansas (39·0931 °N, 96·5586 °W) and at the State Forest State Park (SFSP) in northern Colorado (40·3041 °N, 106·0037 …
INEOS and SINOPEC will also establish a third 50:50 joint venture to build a new 500ktpa HDPE (High-Density Polyethylene) plant in Tianjin. In addition to the Tianjin plant INEOS and SINOPEC shall build at least two additional 500ktpa HDPE plants in the future to produce INEOS pipe grade under license. The INEOS technology is again …
Soil organic carbon (SOC) plays a key role in forming and stabilizing soil structure, enhancing soil physical properties, and nutrient recycling 1,2,3.Soil aggregate, the basic unit of soil ...
If the plant ashes were immersed in water, a large amount of alkaline substances (i.e., KOH, Ca(OH) 2) could be released, which has the potential to enhance the asphalt-aggregate adhesion. The main chemical compositions of plant ashes are SiO 2, K 2 O, CaO, SO 3, MgO, Na 2 O, Fe 3 O 4, Al 2 O 3, and TiO 2 .
China Clay is a aggregate, the surrounding rock (such as a granite deposit) that is excavated to acquire the desired material (china clay) is the secondary aggregate. Recycled aggregate. Recycled aggregates come from reprocessing inorganic or mineral material that have previously been used in construction. Examples of recycled …
Aggregate Crushing Value (ACV) – this is the measurement of the resistance of aggregate to crushing by compressive force. A test specimen (10-14mm) is compressed (up to 400 kN) and the proportion of material passing 2.36 mm is the ACV (mean value of two tests). The higher the value the weaker the aggregate.
The values of WSA>0.5 mm varied between 13% and 85% while for unstable aggregates (WSA<0.2 mm), values are between 8% and 70%. In most cases there was an inverse relationship between WSA>0.5 mm and WSA<0.2 mm. GMD in Table 2 shows that profile OSP has the least values of between 0.66 and 0.46 mm in the top …
With troughs at the elevation of 165 m, the richness began to increase with the increase of the elevation. Conversely, despite the relatively high values of plant biomass in zone III, neither AGB nor BGB showed changing trends with increasing elevations (Fig. 2 c and 2d). Download : Download high-res image (280KB) Download : …
The δ 13 C values indicated that maize-derived OC was preserved the most in the POM within the macroaggregates, particularly under CB. Regarding the molecular composition, all residue amendments increased the abundance ratio of plant- to microbe …
The reused or recycled aggregate generated from concrete or asphalt is also considered a resource with additional high value as an option for the natural aggregate resources, and it can also help achieve environmental preservation .
Some of the studies have noted that the sequestration capacity and stability of SOM by altering in the molecular characteristic and composition of organic matter within the soil aggregates (Pisani
Resource utilization of construction and demolition (C&D) waste has great potential to significantly reduce the consumption of natural resources and improve the environment. Meanwhile, establishing a sound policy system and reducing production are the key ways to solve the problem of C&D waste. Numerous studies on C&D waste, …
1. Introduction. Concrete is the most used construction material, with estimated annual production of 10 billion cubic meters [1].Since 60–80% of the concrete volume is taken by aggregates, the overall consumption of natural aggregates (sand and gravel) is very high, generating huge pressure on surrounding ecosystems [2].The environmental …
The importance of environmental consciousness and sustainability is increasing among transportation governing bodies worldwide. Many government bodies are concerned with maximizing the usage of recycled substances in road construction. Therefore, assessing the effect of recycled materials consumption is essential, mainly …
Amongst various organic manures, poultry manure produced significantly higher plant growth, yield, mineral and proximate composition of okra because of its high soil chemical properties which ...
When natural pit or bank-run aggregate has been crushed and screened to make it suitable for Asphalt Concrete pavements, it is consider - ... physical and chemical properties of a parent material are called synthetic or artificial ... an efficient manufacturing plant capable of. 2-6 Asphalt Paving Materials producing specified materials. Plant ...
The construction sector also imposes a very high quantity of solid waste on the environment during the construction and after the service life of structures (Kisku et al., 2017, Shi et al., 2019).Thus, making the construction industry a major contributor to the global carbon footprint (Santero et al., 2011).According to Anit et al., the concrete …
When an aggregate is subjected to a chemical assault, it is utilized to calculate the percentage loss of the aggregate, according to IS: 2386 (Part V)—1963 . The aggregate was sorted into size fractions: fractions crossing 20 mm retained 10 mm, fractions passing 10 mm retained 4.75 mm, and fractions passing 10 mm kept 4.75 mm.
Different aggregate sizes have different physical and chemical conditions, so a number of studies have examined microorganism distribution according to aggregate size (Trivedi et al., 2015; Xue et al., 2021; Zheng et al., 2018). Bacteria have commonly been linked to micro-aggregates (Bach et al., 2018; Helgason et al., 2010).
Cement. Sub-bases. Outside of construction, aggregates can also be used to produce items such as: Glass. Water filtration. Ceramics. Pharmaceuticals. Foundries. Our Aggregate product mix. Read more …
It gains significance during the transportation and storage of materials in the batching plant. Usually, the bulk density values for fine or coarse aggregate is in the range of 1350 to 1650 kg per meter cube. Importance Of Bulk Density Of Aggregate. Bulk density of coarse aggregate under the dry rodded condition is called its dry rodded unit ...
Background and aims Dissolved organic matter (DOM) stands out as a highly active component within the organic matter pool. It is hypothesized to play a crucial role by adsorbing onto minerals and serving as a precursor for soil aggregates. However, the impact of DOM substrate types and addition levels on the intricate dynamics of soil …
In "agro-concretes", highly-porous plant-based particles are used, and are responsible for massive water absorption. It is often reported (Nguyen et al. 2010; Arnaud and Gourlay 2012) that this hydrophilic nature of the plant materials leads to competition with hydraulic binders, which require at least a certain amount of water in order to form …
The aggregate industry includes concrete batch plants, rock crushing operations, and hot mix asphalt plants. The 17-county expanse of the Hill Country is located just to the north and west of fast-growing San Antonio, Austin, and the rapidly urbanizing Interstate Highway 35 corridor connecting these cities.
There are three main types: natural aggregate (from mineral sources with nothing more than physical processing, often referred to as 'primary aggregate'), manufactured …
Purpose Long-term fertilization is a widely accepted strategy to enhance soil organic (SOC). However, fertilization effects on the stability of aggregate-associated OC remained largely unknown. Thus, stability of aggregate-associated OC was studied through aggregate fractionation, C-mineralization, and 13C NMR analyses. Materials and …
Soil organic carbon (SOC) concentration in WSA0.106-0.25,WSA2-5 mm and WSA0.5-1 mm had a dominant effect on aggregate stability.
Fertilization plays a crucial role in enhancing tea production. However, it has been demonstrated that the long-term single application of chemical fertilizer will reduce soil nutrient content and the formation of soil aggregates, which is not conducive to the sustainable development of soil and agriculture. Many studies have shown that partial …
Effects of biochar on plant growth and hydro-chemical properties of recycled concrete aggregate Sci Total Environ. 2023 Jul 15;882:163557. doi: 10.1016/j ... The water retention capacity of RCA was enhanced by improving the saturated water content and air-entry value by 27 % and 100 %. The slope of the soil suction-LAI correlation for biochar ...
Introduction. Planting concrete is a kind of porous concrete made of cement binder and coarse aggregate. In comparison to conventional concrete, as depicted in Fig. 1, planting concrete provides room for soil filling, facilitating plant root development while maintaining sufficient mechanical properties (Ganapathy et al., 2023).
Purpose Since principles of conservation agriculture mimic the soil conditions of undisturbed natural soils, linking aggregation and dissolved organic matter (DOM) occlusion would therefore provide a targeted descriptor for soil health advances of innovative farming systems. This study aimed to assess structure-related DOM patterns …
