19 research outputs found
Performances Based Study On High Strengh Concrete Using Fiber As The Replacement
Processed sand is increasingly used as an alternative. With the prohibition of sand mining in several states and the increasing demand for river sand for construction work, many civil engineers have expressed the need to promote the use of manufactured sand in the construction industry. Manufactured sand is reportedly used extensively around the world and technicians at major projects around the world insist on the mandatory use of manufactured sand due to its constant gradation and no impurities. Ordinary concrete lacks the required strength and durability often required for large concrete structures such as tall buildings, bridges, and structures under severe exposure conditions. Due to the prosperous construction activities, natural sand has become scarce due to excessive unscientific methods of extraction from the river bed. For these reasons, it is necessary to produce improved concrete with high strength, using suitable materials. This article demonstrates the effective use of the product fibers and M-sand in high-strength concrete
An Experimental Study On Strength Characteristics Of Fiber Rinforced Concrete By Using Pozzolanas
High Performance Concrete Is Defined As Concrete That Meets Special Performance Sets And Standardization Requirements That Cannot Always Be Routinely Achieved Using Conventional Ingredients And Normal Mixing, Formulation And Curing Practices. It Has Been Widely Used In Large-Scale Concrete Construction Requiring High Strength, High Flow Capacity, And High Durability. High-Strength Concrete Is Always High-Strength Concrete, But High-Performance Concrete Is Not Always High-Strength Concrete. Durable Concrete Selecting High-Strength Concrete Does Not Guarantee The Achievement Of Durable Concrete. It Is Very Difficult To Get A Product That Meets All The Characteristics At The Same Time. So Various Pozzolanic Substances Like Granular Floor Kiln Slag (Ggbs), Silica Fume, Rice Husk Ash, Fly Ash, And Highly Reactive Methacholine Are Some Of The Pozzolanic Materials That Can Be Used In Concrete. As A Partial Substitute For Cement, Which Are Very Basic Ingredients To Produce High-Performance Concrete. We Prepare Grout, Cube, Cylinder, Sawing And Finally Compression Test, Split Test And Bending Test. Finally, The Porosity And Permeability Test Was Carried Out. Furthermore, To Obtain Such Performances That Cannot Be Obtained From Conventional Concrete And With The Current Method, A Large Number Of Experimental Mixtures Are Required To Determine The Desired Combination Of Materials That Meet The Particular Performance.
Enantiospecific synthesis of the complete carbon framework of the diterpenes komarovispiranes
1999-2003Enantiospecific total synthesis of komarovispiradiene, containing a novel carbon framework trans-bicyclo[4.3.0]nonanespiro[8.1']cyclohexane, starting from campholenaldehyde is described
First synthesis of (±)-tenuifolene and <i style="">ar</i>-tenuifolene
1641-1643First total synthesis of
the sesquiterpenes (±)-tenuifolene
and (±)-ar-tenuifolene,
isolated from the essential oil of the East African sandalwood tree Osyris tenuifolia, has been
accomplished
Synthetic approaches to komarovispiranes. Enantiospecific synthesis of bicyclo[3.3.0]octanespiro[3.1']cyclohexanes
A ring-closing metathesis based spiroannulation of cyclopentane and cyclohexanes at the C-3 carbon atom of a bicyclo[3.3.0]octane, as a model study directed towards the enantiospecific synthesis of the novel diterpenes komarovispiranes, is described
Enantiospecific synthesis of the complete carbon framework of the diterpenes komarovispiranes
Enantiospecific total synthesis of komarovispiradiene starting from campholenaldehyde is described
Synthetic approaches to komarovispiranes. Enantiospecific synthesis of bicyclo[3.3.0]octanespiro[3.1′]cyclohexanes
A ring-closing metathesis based spiroannulation of cyclopentane and cyclohexanes at the C-3 carbon atom of a bicyclo[3.3.0]octane, as a model study directed towards the enantiospecific synthesis of the novel diterpenes komarovispiranes, is described
Synthesis of (±)-ar-macrocarpene
An efficient first synthesis of the sesquiterpene ar-macrocarpene, an irregular sesquiterpene isolated from Cupressus macrocarpa foliage, starting from 3-methylcyclohexenone has been described, which confirmed the structures of macrocarpenes
Synthesis of (±)‐ar‐Macrocarpene
An efficient first synthesis of the sesquiterpene ar-macrocarpene, an irregular sesquiterpene isolated from Cupressus macrocarpa foliage, starting from 3-methylcyclohexenone has been described, which confirmed the structures of macrocarpenes
An enantiospecific synthesis of a komarovispirane
The enantiospecific total synthesis of a komarovispirane, containing the complete carbon framework, trans-bicyclo[4.3.0]nonanespiro[8.1′]cyclohexane, of the spiroditerpene komarovispirone, starting from the readily available campholenaldehyde is described