87results about How to "Improve temperature sensitivity" patented technology

The invention discloses an electrical heat pan which comprises an outer pan, an inner pan, an upper cover which at least covers the inner pan, and a temperature detecting device which is arranged on the outer pan, wherein a temperature detecting component comprises a temperature detecting probe which is provided with a first position and a second position, a notch is formed in the upper edge of the inner pan, when the temperature detecting probe is located at the first position, the inner pan can be freely placed inside the outer pan; when the inner pan is placed inside the outer pan and the temperature detecting probe is located at the second position, the temperature detecting probe penetrates through the notch and enters the inner pan. Due to the fact that the temperature detecting component is not arranged on the upper cover but is arranged on the outer pan, the electrical heat pan is simple in structure, easy to assemble and low in cost, the temperature detecting probe of the electrical heat pan can extend into the inner pan, so that the temperature detecting effect is good.

The invention provides a modified asphalt composition and a preparation method thereof. The modified asphalt composition comprises, by weight, 87.5% to 98.9% of base asphalt, 1% to 10% of a modifier and 0.1% to 2.5% of a gelatinizing agent (a structure improver). The preparation method comprises the following steps: uniformly dispersing the modifier into the base asphalt at a temperature of 150 to 260 DEG C by using equipment like an ordinary agitator, a high speed shearing machine or a colloid mill to prepare the modified asphalt composition; and adding the gelatinizing agent to allow a sol-gel type colloid structure of asphalt to be converted into a gel type colloid structure and to allow a stable colloid structure of asphalt to be formed. According to the invention, the preparation method for the modified asphalt composition is simple; and the prepared modified asphalt composition has a high softening point, high viscosity, a high penetration index, excellent high and low temperature performance, excellent ageing resistance, small temperature sensitivity and the like, can reduce occurrence of damages like tracks and upheaval on a pavement and prolong a maintenance period of the pavement and is applicable to construction of high-grade highways.